The Thai highway network follows the left-hand traffic rule of the road. The network is the twin responsibility of the Department of Highways (DOH, , Krom Thang Luang), and the Department of Rural Roads

Department of Rural Roads

Department of Rural Roads is a department of the Thai government, under the Ministry of Transport...

 (DORR, , Krom Thang Luang Chonnabot), under the oversight of the Transportation ministry

Transportation ministry

A Ministry of Transport is a ministry or other government agency charged with transport. It may be headed by a Minister for Transport.Specific duties may be overseeing transportation safety, developing government transportation policy, organizing public transport, and the maintenance and...

 of Thailand

Thailand

Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...

. Public highway

Highway

A highway is any public road. In American English, the term is common and almost always designates major roads. In British English, the term designates any road open to the public. Any interconnected set of highways can be variously referred to as a "highway system", a "highway network", or a...

s are also called public road

Road

A road is a thoroughfare, route, or way on land between two places, which typically has been paved or otherwise improved to allow travel by some conveyance, including a horse, cart, or motor vehicle. Roads consist of one, or sometimes two, roadways each with one or more lanes and also any...

s , especially when part of urban streets. The network spans over 70,000 kilometers across all regions of Thailand.
Most are single carriageway

Single carriageway

A single carriageway is a road with 1, 2 or more lanes arranged within a single carriageway with no central reservation to separate opposing flows of traffic. Two-lane road or two-lane highway are single carriageway with one lane for each direction...

s. Dual carriageway

Dual carriageway

A dual carriageway is a class of highway with two carriageways for traffic travelling in opposite directions separated by a central reservation...

s have frequent u-turn lanes and intersections slowing down traffic. Coupled with the increase in the number of vehicles and the demand for a limited-access motorway, the Thai Government issued a Cabinet resolution in 1997 detailing the motorway construction master plan. Some upgraded sections of highway are being turned into a "motorway", while other motorways are not being built from highway sections. See Thai motorway network

Thai motorway network

The Thai motorway network is an intercity motorway network that currently spans 145 kilometers. It is to be greatly extended to 4154.7 kilometers according to the master plan....

.

Types of highways

The 1992 Highway Act , revised as the 2006 Highway Act , defines the following five highway types:

A special highway or motorway is a high capacity highway designed for high speed traffic, for which the Department of Highways carries out construction, expansion, upkeep and repairs, and is registered as such. Motorway entrances and exits have controlled access, and controlled by the DOH. Registration of motorways is overseen by the Director General of the DOH.

A national highway is a primary highway, part of the network connecting regions, provinces, districts, and other important destinations, for which the DOH carries out construction, expansion, upkeep and repairs. Registration of national highways is overseen by the Director General of the DOH.

A rural highway or rural road is a highway for which the Department of Rural Roads carries out construction, expansion, upkeep and repairs. Registration of rural highways is overseen by the Director General of the DORR.

A local highway or local route is a highway for which the local administrative organization carries out construction, expansion, upkeep and repairs. Registration of rural highways is overseen by the provincial governor.

A concession highway is a highway for which a legal government concession has been granted. Registration of concession highways is overseen by the Director General of the DOH.

Highway numbering

The first digit of a highway number indicates the region of Thailand it primarily services:

• Highways beginning with 1 are in northern Thailand
  Northern Thailand
  Thailand's northern region is geographically characterised by multiple mountain ranges which continue from the Shan Hills in bordering Myanmar and Laos, and the river valleys which cut through them...
  
  .
• Highways beginning with 2 are in northeastern Thailand
  Isan
  Isan is the northeastern region of Thailand. It is located on the Khorat Plateau, bordered by the Mekong River to the north and east, by Cambodia to the southeast and the Prachinburi mountains south of Nakhon Ratchasima...
  
  .
• Highways beginning with 3 are in central
  Central Thailand
  Central Thailand is a region of Thailand, covering the broad alluvial plain of the Chao Phraya River. It is separated from North-East Thailand by the Phetchabun mountain range, and another mountain range separates it from Myanmar to the west. In the north it gently changes into the more hilly...
  
   and eastern
  Eastern Thailand
  Eastern Thailand is a region of Thailand bordering Cambodia on the east and Central Thailand on the west.-Geography:Eastern Thailand lies between the Sankamphaeng Range, which forms the border of the Northeastern plateau to the north and the Gulf of Thailand to the south...
  
  , as well as the upper south
  Southern Thailand
  Southern Thailand is a distinct region of Thailand, connected with the Central region by the narrow Kra Isthmus.-Geography:Southern Thailand is located on the Malay Peninsula, with an area around 70,713 km², bounded to the north by Kra Isthmus as the narrowest part of the peninsula. The...
  
  .
• Highways beginning with 4 are in southern Thailand
  Southern Thailand
  Southern Thailand is a distinct region of Thailand, connected with the Central region by the narrow Kra Isthmus.-Geography:Southern Thailand is located on the Malay Peninsula, with an area around 70,713 km², bounded to the north by Kra Isthmus as the narrowest part of the peninsula. The...
  
  .

The number of digits in a highway number indicates the classification of the highway.

A single digit number indicates a principal highway connecting between regions. There are four of these:

• Route 1 (Phahonyothin Road), Northern Thailand
  Northern Thailand
  Thailand's northern region is geographically characterised by multiple mountain ranges which continue from the Shan Hills in bordering Myanmar and Laos, and the river valleys which cut through them...
  
  
• Route 2 (Mittraphap Road), Northeastern Thailand
• Route 3 (Sukhumvit Road
  Sukhumvit Road
  Sukhumvit Road , or Thailand Route 3 , is a major road in Thailand, and a major surface road of Bangkok and other cities it winds through. It follows a coastal route from Bangkok to Trat and is just over in length....
  
  ), Eastern Thailand
  Eastern Thailand
  Eastern Thailand is a region of Thailand bordering Cambodia on the east and Central Thailand on the west.-Geography:Eastern Thailand lies between the Sankamphaeng Range, which forms the border of the Northeastern plateau to the north and the Gulf of Thailand to the south...
  
  
• Route 4 (Phetkasem Road), Southern Thailand
  Southern Thailand
  Southern Thailand is a distinct region of Thailand, connected with the Central region by the narrow Kra Isthmus.-Geography:Southern Thailand is located on the Malay Peninsula, with an area around 70,713 km², bounded to the north by Kra Isthmus as the narrowest part of the peninsula. The...
  
  

A two-digit number indicates a principal highway within a region. For example, Route 22 is a main highway in the northeast that runs between Udon Thani

Udon Thani Province

Udon Thani is one of the north-eastern provinces of Thailand. Neighboring provinces are Nong Khai, Sakon Nakhon, Kalasin, Khon Kaen, Nong Bua Lamphu and Loei.- Geography :...

 and Nakhon Phanom

Nakhon Phanom Province

Nakhon Phanom is one of the north-eastern provinces of Thailand. Neighboring provinces are Mukdahan, Sakon Nakhon and Bueng Kan. To the north-east it borders Khammouan of Laos.-Geography:...

.

A three-digit number indicates a secondary highway. For example, Route 202 is a secondary highway in the northeast that runs between Chaiyaphum and Khemarat; Route 314 is a secondary highway in the central region, between Bang Pakong and Cha Choeng Sao.

A four-digit number indicates an intra-province highway connecting the provincial capital to the districts, or to important sites in the province. For example, Route 1001 is a northern highway that runs between Route 11 Intersection and Amphoe Phrao; Route 4006 is a southern highway that runs between Route 4 Intersection (Ratchakrut) and Lang Suan.

Northern Thailand

Northern Thailand

Thailand's northern region is geographically characterised by multiple mountain ranges which continue from the Shan Hills in bordering Myanmar and Laos, and the river valleys which cut through them...

 

• Route 1 (Phahon Yothin Road) : Bangkok
  Bangkok
  Bangkok is the capital and largest urban area city in Thailand. It is known in Thai as Krung Thep Maha Nakhon or simply Krung Thep , meaning "city of angels." The full name of Bangkok is Krung Thep Mahanakhon Amon Rattanakosin Mahintharayutthaya Mahadilok Phop Noppharat Ratchathani Burirom...
  
   – Chiang Rai
  Chiang Rai
  -Demographics:Official Population count: According to the Thailand National Statistical Office, as of September 2010, Chiang Rai municipal district has a population of 199,699...
  
   and continuing to Tachilek, Burma as
• Route 11 : In Buri
  Amphoe In Buri
  In Buri is the northernmost district of Singburi Province in central Thailand.-History:In Buri is an ancient city, one of the major Mueang or city states. It was built in the reign of King Ramesuan in 1369. In the Ayutthaya era, the governor of In Buri always was a royal family member because In...
  
  , Sing Buri
  Sing Buri Province
  Sing Buri is one of the central provinces of Thailand. Neighboring provinces are Nakhon Sawan, Lop Buri, Ang Thong, Suphan Buri and Chai Nat....
  
   – Chiang Mai
  Chiang Mai
  Chiang Mai sometimes written as "Chiengmai" or "Chiangmai", is the largest and most culturally significant city in northern Thailand. It is the capital of Chiang Mai Province , a former capital of the Kingdom of Lanna and was the tributary Kingdom of Chiang Mai from 1774 until 1939. It is...
  
  
• Route 12 : Tak
  Tak Province
  Tak is one of the northern provinces of Thailand. Neighboring provinces are Mae Hong Son, Chiang Mai, Lamphun, Lampang, Sukhothai, Kamphaeng Phet, Nakhon Sawan, Uthai Thani and Kanchanaburi...
  
   – Khon Kaen
  Khon Kaen
  Khon Kaen is a city in Isan, Thailand. It is also the capital of Khon Kaen province and the Khon Kaen district.-Geography and demography:Khon Kaen is located in the Khorat Plateau, in the central-northwestern area of Isaan...
  
   as and continues into northeastern Thailand superseding Route 2042 : Somdet
  Amphoe Somdet
  Somdet is a district in the northeastern part of Kalasin Province, northeastern Thailand.-Geography:Neighboring districts are Huai Phueng, Na Mon, Mueang Kalasin, Sahatsakhan, Kham Muang of Kalasin Province and Phu Phan of Sakon Nakhon Province.-History:The minor district Somdet was created on...
  
  , Kalasin
  Kalasin Province
  Kalasin is one of the provinces of Thailand, located in the North-East of Thailand. Neighboring provinces are Sakon Nakhon, Mukdahan, Roi Et, Maha Sarakham, Khon Kaen and Udon Thani.-Geography:...
  
  -Mukdahan
  Mukdahan Province
  Mukdahan is one of the north-eastern provinces of Thailand. Neighboring provinces are Amnat Charoen, Yasothon, Roi Et, Kalasin, Sakon Nakhon and Nakhon Phanom. To the east it borders the Mekong River, across which lies Savannakhet Province of Laos.-Geography:The province is located in the...
  
  
• Route 101 : Kamphaeng Phet
  Kamphaeng Phet
  Kamphaeng Phet is a town in northern Thailand, capital of the Kamphaeng Phet Province. It covers the complete tambon Nai Mueang of the Mueang Kamphaeng Phet district. As of 2005 it has a population of 30,114.-External links:...
  
   – Nan
  Nan, Thailand
  Nan is a town in Northern Thailand. It is located some 668 km north of Bangkok. Its population exceeds 24.000. It is situated in the centre of the province which bears its name, and of which it is the administrative capital. It covers the whole tambon Nai Wiang of Mueang Nan district, an area...
  
  
• Route 102 : Si Satchanalai
  Amphoe Si Satchanalai
  Si Satchanalai is the northernmost district of Sukhothai Province, northern Thailand. Si may also be transliterated as Sri.-Geography:...
  
  , Sukhothai
  Sukhothai Province
  Sukhothai is one of the northern provinces of Thailand. Neighboring provinces are Phrae, Uttaradit, Phitsanulok, Kamphaeng Phet, Tak, and Lampang...
  
   – Uttaradit
  Uttaradit
  Uttaradit is a town in Thailand, capital of the Uttaradit province. The town covers the whole tambon Tha It of Mueang Uttaradit district...
  
  
• Route 103 : Rong Kwang
  Amphoe Rong Kwang
  Rong Kwang is a district in the northeastern part of Phrae Province, northern Thailand.-Geography:Neighboring districts are Mueang Phrae, Nong Muang Khai, Song of Phrae Province, Wiang Sa, Na Noi and Na Muen of Nan Province.-History:The minor district Rong Kwang was upgraded to a full district in...
  
  , Phrae
  Phrae Province
  Phrae is one of the northern provinces of Thailand. Neighboring provinces are Phayao, Nan, Uttaradit, Sukhothai and Lampang.-Geography:Phrae is located in the valley of the river Yom.-History:...
  
   – Ngao
  Amphoe Ngao
  -Geography:Neighboring districts are : Mae Mo, Chae Hom and Wang Nuea of Lampang Province, Mueang Phayao and Dok Khamtai of Phayao Province, and Song of Phrae Province.-History:...
  
  , Lampang
  Lampang Province
  Lampang is one of the northern provinces of Thailand. Neighboring provinces are Chiang Rai, Phayao, Phrae, Sukhothai, Tak, Lamphun and Chiang Mai. The old name of Lampang is Khelang Nakhon.-Geography:...
  
  
• Route 104 : Kosamphi Nakhon
  Amphoe Kosamphi Nakhon
  Kosamphi Nakhon is a district in the northwestern part of Kamphaeng Phet Province, northern Thailand.-History:In Sukhothai Kingdom era, Mueang Kosamphi was a satellite city of the frontier city Mueang Chakangrao , at same level as Mueang Nakhon Chum, Trai Trueng, Phan and Phangkha...
  
  , Kamphaeng Phet
  Kamphaeng Phet Province
  Kamphaeng Phet is one of the provinces of Thailand, located in the north of the country. Neighboring provinces are Sukhothai, Phitsanulok, Phichit, Nakhon Sawan and Tak.- Etymology :...
  
   – Tak
  Tak (town)
  Tak is a town in northwest of Thailand, capital of the Tak Province and the Tak district. As of 2005 the town has a population of 19,900 and an area of 7.27 km². It covers the tambon Rahaeng, Nong Luang, Chiang Ngoen and Hua Diat, and is located on the Ping River.-External links:*...
  
  
• Route 105 : Tak
  Tak (town)
  Tak is a town in northwest of Thailand, capital of the Tak Province and the Tak district. As of 2005 the town has a population of 19,900 and an area of 7.27 km². It covers the tambon Rahaeng, Nong Luang, Chiang Ngoen and Hua Diat, and is located on the Ping River.-External links:*...
  
   – Mae Sariang, Mae Hong Son
  Mae Hong Son Province
  Most of the areas of Mae Hong Son Province are complex mountain ranges and likely still pristine virgin forest. Of the approximately 6,976,650 rai of national forest reserves, 88.02% is thought to be pristine virgin forest...
  
  
• Route 106 : Thoen
  Amphoe Thoen
  Thoen is a district in the southern part of Lampang Province, northern Thailand.-Geography:Neighboring districts are : Soem Ngam, Sop Prap of Lampang Province, Wang Chin of Phrae Province, Si Satchanalai, Thung Saliam, Ban Dan Lan Hoi of Sukhothai Province, Ban Tak, Sam Ngao of Tak Province, Mae...
  
  , Lampang
  Lampang Province
  Lampang is one of the northern provinces of Thailand. Neighboring provinces are Chiang Rai, Phayao, Phrae, Sukhothai, Tak, Lamphun and Chiang Mai. The old name of Lampang is Khelang Nakhon.-Geography:...
  
   – Chiang Mai
  Chiang Mai
  Chiang Mai sometimes written as "Chiengmai" or "Chiangmai", is the largest and most culturally significant city in northern Thailand. It is the capital of Chiang Mai Province , a former capital of the Kingdom of Lanna and was the tributary Kingdom of Chiang Mai from 1774 until 1939. It is...
  
  
• Route 107 : Chiang Mai
  Chiang Mai
  Chiang Mai sometimes written as "Chiengmai" or "Chiangmai", is the largest and most culturally significant city in northern Thailand. It is the capital of Chiang Mai Province , a former capital of the Kingdom of Lanna and was the tributary Kingdom of Chiang Mai from 1774 until 1939. It is...
  
   – Mae Ai
  Amphoe Mae Ai
  Mae Ai is the northernmost district of Chiang Mai Province, northern Thailand.-History:The minor district Mae Ai was created on August 15, 1967, when the three tambon Mae Ai, Mae Sao and Mae Na Wang were separated from Fang district...
  
  , Chiang Mai
  Chiang Mai Province
  Chiang Mai is the second-largest province of Thailand, located in the north of the country. Neighboring provinces are Chiang Rai, Lampang, Lamphun, Tak, and Mae Hong Son. In the north it borders Shan State of Burma...
  
  
• Route 108 : Chiang Mai
  Chiang Mai
  Chiang Mai sometimes written as "Chiengmai" or "Chiangmai", is the largest and most culturally significant city in northern Thailand. It is the capital of Chiang Mai Province , a former capital of the Kingdom of Lanna and was the tributary Kingdom of Chiang Mai from 1774 until 1939. It is...
  
   – Mae Hong Son
  Mae Hong Son
  Mae Hong Son ) is a town in north west Thailand, capital of the Mae Hong Son Province. It is located in the Shan Hills, near the border with Burma along the banks of the river Pai...
  
  
• Route 109 : Fang
  Amphoe Fang
  Fang is a district in the northern part of Chiang Mai Province, northern Thailand.-History:According to the Yonok chronicle, Mueang Fang was built in 641 by King Lawa Changkarat. Later King Mengrai the Great reigned Fang before building Wiang Kumkam and Chiang Mai of Lanna Kingdom for one year...
  
  , Chiang Mai
  Chiang Mai Province
  Chiang Mai is the second-largest province of Thailand, located in the north of the country. Neighboring provinces are Chiang Rai, Lampang, Lamphun, Tak, and Mae Hong Son. In the north it borders Shan State of Burma...
  
   – Mae Suai
  Amphoe Mae Suai
  Mae Suai is a district in the western part of Chiang Rai Province, northern Thailand.-Geography:Neighboring districts are Mueang Chiang Rai, Mae Lao, Phan, Wiang Pa Pao, Phrao, Chai Prakan, Fang, Mae Ai of Chiang Mai Province.-History:The district was created in 1905, when the districts Mueang...
  
  , Chiang Rai
  Chiang Rai Province
  Chiang Rai is the northernmost province of Thailand. Neighbouring provinces are Phayao, Lampang and Chiang Mai. In the north it borders Shan State of Myanmar and Bokeo of Laos.-Geography:...
  
  
• Route 110 : Chiang Rai
  Chiang Rai
  -Demographics:Official Population count: According to the Thailand National Statistical Office, as of September 2010, Chiang Rai municipal district has a population of 199,699...
  
   – Mae Sai, Chiang Rai
  Chiang Rai Province
  Chiang Rai is the northernmost province of Thailand. Neighbouring provinces are Phayao, Lampang and Chiang Mai. In the north it borders Shan State of Myanmar and Bokeo of Laos.-Geography:...
  
   (now superseded by Route 1)
• Route 111 : Phichit
  Phichit
  Phichit is a town in northern Thailand, capital of the Phichit Province. It covers the whole tambon Nai Mueang of Mueang Phichit district, an area of 12.017 km²...
  
   – Sak Lek
  Amphoe Sak Lek
  Sak Lek is a district in the northeastern part of Phichit Province, northern Thailand.-Geography:Neighboring districts are Wang Sai Phun and Mueang Phichit of Phichit Province, Bang Krathum, Wang Thong and Noen Maprang of Phitsanulok Province.-History:The minor district was established on April...
  
  , Phichit
• Route 112 (now superseded by Route 11)
• Route 113 : Phichit
  Phichit
  Phichit is a town in northern Thailand, capital of the Phichit Province. It covers the whole tambon Nai Mueang of Mueang Phichit district, an area of 12.017 km²...
  
   – Phetchabun
  Phetchabun
  Phetchabun is a town in Thailand, capital of the Phetchabun Province. It covers the tambon Nai Mueang of the Phetchabun district, along the Pa Sak River...
  
  
• Route 114 : Lamphun
  Lamphun
  Lamphun is a town in northern Thailand, capital of Lamphun Province. It covers the whole tambon Nai Mueang of Mueang Lamphun district...
  
   town route
• Route 115 : Kamphaeng Phet
  Kamphaeng Phet
  Kamphaeng Phet is a town in northern Thailand, capital of the Kamphaeng Phet Province. It covers the complete tambon Nai Mueang of the Mueang Kamphaeng Phet district. As of 2005 it has a population of 30,114.-External links:...
  
   - Phichit
  Phichit
  Phichit is a town in northern Thailand, capital of the Phichit Province. It covers the whole tambon Nai Mueang of Mueang Phichit district, an area of 12.017 km²...
  
  
• Route 116
• Route 117 : Nakhon Sawan
  Nakhon Sawan
  Nakhon Sawan is a city in Thailand, the name literally means "Heavenly City". The city is the capital of Nakhon Sawan Province, and covers the complete subdistrict Pak Nam Pho and parts of Khwae Yai, Nakhon Sawan Tok, Nakhon Sawan Ok and Wat Sai, all of Mueang Nakhon Sawan district...
  
   – Phitsanulok
  Phitsanulok
  Phitsanulok is an important and historic city in lower northern Thailand and is the capital of Phitsanulok Province, which stretches all the way to the Laotian border. Phitsanulok is one of the oldest cities in Thailand, founded over 600 years ago...
  
  
• Route 118 : Chiang Mai
  Chiang Mai
  Chiang Mai sometimes written as "Chiengmai" or "Chiangmai", is the largest and most culturally significant city in northern Thailand. It is the capital of Chiang Mai Province , a former capital of the Kingdom of Lanna and was the tributary Kingdom of Chiang Mai from 1774 until 1939. It is...
  
   – Chiang Rai
  Chiang Rai
  -Demographics:Official Population count: According to the Thailand National Statistical Office, as of September 2010, Chiang Rai municipal district has a population of 199,699...
  
  
• Route 119 : Uttaradit
  Uttaradit
  Uttaradit is a town in Thailand, capital of the Uttaradit province. The town covers the whole tambon Tha It of Mueang Uttaradit district...
  
   town route
• Route 120
• Route 121 : Chiang Mai
  Chiang Mai
  Chiang Mai sometimes written as "Chiengmai" or "Chiangmai", is the largest and most culturally significant city in northern Thailand. It is the capital of Chiang Mai Province , a former capital of the Kingdom of Lanna and was the tributary Kingdom of Chiang Mai from 1774 until 1939. It is...
  
   Outer Ring Road
• Route 122 : Nakhon Sawan
  Nakhon Sawan
  Nakhon Sawan is a city in Thailand, the name literally means "Heavenly City". The city is the capital of Nakhon Sawan Province, and covers the complete subdistrict Pak Nam Pho and parts of Khwae Yai, Nakhon Sawan Tok, Nakhon Sawan Ok and Wat Sai, all of Mueang Nakhon Sawan district...
  
   Bypass Road
• Route 123
• Route 125 : Sukhothai
  Sukhothai Province
  Sukhothai is one of the northern provinces of Thailand. Neighboring provinces are Phrae, Uttaradit, Phitsanulok, Kamphaeng Phet, Tak, and Lampang...
  
   Bypass Road
• Route 126 : Phitsanulok
  Phitsanulok
  Phitsanulok is an important and historic city in lower northern Thailand and is the capital of Phitsanulok Province, which stretches all the way to the Laotian border. Phitsanulok is one of the oldest cities in Thailand, founded over 600 years ago...
  
   Bypass Road

Northeastern Thailand 

• Route 2 (Mittraphap Road) : Saraburi
  Saraburi Province
  Saraburi is one of the central provinces of Thailand. Neighboring provinces are Lopburi, Nakhon Ratchasima, Nakhon Nayok, Pathum Thani and Ayutthaya. Saraburi has been an important town since ancient times...
  
  –Nong Khai
  Nong Khai Province
  Nong Khai is the northernmost of the north-eastern provinces of Thailand. Neighboring provinces are Bueng Kan, Sakon Nakhon, Udon Thani and Loei...
  
   as .
• Route 21 (Khotchaseni Road) : Saraburi
  Saraburi Province
  Saraburi is one of the central provinces of Thailand. Neighboring provinces are Lopburi, Nakhon Ratchasima, Nakhon Nayok, Pathum Thani and Ayutthaya. Saraburi has been an important town since ancient times...
  
  –Phetchabun
  Phetchabun Province
  Phetchabun is one of the northern provinces of Thailand. Neighboring provinces are Loei, Khon Kaen, Chaiyaphum, Lopburi, Nakhon Sawan, Phichit and Phitsanulok.- Geography :...
  
  .
• Route 22 (Nittayo Road) : Udon Thani
  Udon Thani Province
  Udon Thani is one of the north-eastern provinces of Thailand. Neighboring provinces are Nong Khai, Sakon Nakhon, Kalasin, Khon Kaen, Nong Bua Lamphu and Loei.- Geography :...
  
  –Nakhon Phanom
  Nakhon Phanom Province
  Nakhon Phanom is one of the north-eastern provinces of Thailand. Neighboring provinces are Mukdahan, Sakon Nakhon and Bueng Kan. To the north-east it borders Khammouan of Laos.-Geography:...
  
   as .
• Route 23 (Chaeng Sanit Road, ถนนแจ้งสนิท) : Ban Phai
  Amphoe Ban Phai
  Ban Phai is a district of Khon Kaen Province, northeastern Thailand.-Geography:Neighboring districts are Pueai Noi, Nong Song Hong, Non Sila, Chonnabot, Mancha Khiri and Ban Haet of Khon Kaen Province, Kosum Phisai and Kut Rang of Maha Sarakham Province.-History:Originally named Ban Keng , the...
  
  , Khon Kaen
  Khon Kaen Province
  -History:The first city of the area was established in 1783 when Rajakruluang settled there with 330 people. King Rama I made Rajakruluang the first governor of the area when establishing tighter connections with the Isan area. The main city was moved six times until in 1879 it reached its modern...
  
  –Ubon Ratchathani
  Ubon Ratchathani Province
  -History:The area was part of the Khmer Empire. Before the late eighteenth century, this area evidently was outside Siamese or Thai Ayutthaya Kingdom....
  
  .
• Route 24 (Sathonlamak Road) : Nakhon Ratchasima
  Nakhon Ratchasima Province
  Nakhon Ratchasima or , often shortened to Korat or Khorat , is one of the north-eastern provinces of Thailand...
  
  –Ubon Ratchathani
  Ubon Ratchathani Province
  -History:The area was part of the Khmer Empire. Before the late eighteenth century, this area evidently was outside Siamese or Thai Ayutthaya Kingdom....
  
  .

• Route 201 : Sikhio
  Amphoe Sikhio
  Sikhio is a district in the western part of Nakhon Ratchasima Province, Thailand.-History:Originally known as Mueang Nakhon Chantuek, Sikhio is an ancient frontier city between the Thai dominated Chao Phraya valley and the Lao dominated Khorat Plateau. There is not record of the time of its...
  
  , Nakhon Ratchasima
  Nakhon Ratchasima Province
  Nakhon Ratchasima or , often shortened to Korat or Khorat , is one of the north-eastern provinces of Thailand...
  
  –Chiang Khan
  Amphoe Chiang Khan
  Chiang Khan is a district in the northern part of Loei Province, northeastern Thailand.-Geography:Neighboring districts are Pak Chom, Mueang Loei and Tha Li of Loei Province...
  
  , Loei
  Loei Province
  Loei is one of the most sparsely populated provinces of Thailand, located in the North-East. Neighboring provinces are Nong Khai, Udon Thani, Nongbua Lamphu, Khon Kaen, Phetchabun, Phitsanulok...
  
  
• Route 202 (Arunprasert Road) : Chaiyaphum
  Chaiyaphum Province
  Chaiyaphum is one of the north-eastern provinces of Thailand. Neighboring provinces are Khon Kaen, Nakhon Ratchasima, Lopburi and Phetchabun.- Etymology :...
  
  –Khemarat
  Amphoe Khemarat
  Khemarat is the northernmost district of Ubon Ratchathani Province, northeastern Thailand.-History:Mueang Khemarat is an ancient city. It was a first class city during Rattanakosin era and reported directly to Bangkok...
  
  , Ubon Ratchathani
  Ubon Ratchathani Province
  -History:The area was part of the Khmer Empire. Before the late eighteenth century, this area evidently was outside Siamese or Thai Ayutthaya Kingdom....
  
  
• Route 203 : Lom Sak
  Amphoe Lom Sak
  Lom Sak is a district in the northern part of Phetchabun Province, northern Thailand.-History:The history of Lom Sak area dates back to the founding time of the Sukhothai kingdom in the 13th century. The governor of Mueang Rat , Pho Khun Pha Mueang , was one of Thai warlords who defeated the...
  
  , Phetchabun
  Phetchabun Province
  Phetchabun is one of the northern provinces of Thailand. Neighboring provinces are Loei, Khon Kaen, Chaiyaphum, Lopburi, Nakhon Sawan, Phichit and Phitsanulok.- Geography :...
  
  –Loei
  Loei Province
  Loei is one of the most sparsely populated provinces of Thailand, located in the North-East. Neighboring provinces are Nong Khai, Udon Thani, Nongbua Lamphu, Khon Kaen, Phetchabun, Phitsanulok...
  
  
• Route 205 (Suranarai Road) : Lopburi
  Lopburi Province
  Lop Buri is one of the central provinces of Thailand. Neighboring provinces are Phetchabun, Chaiyaphum, Nakhon Ratchasima, Saraburi, Phra Nakhon Si Ayutthaya, Ang Thong, Sing Buri and Nakhon Sawan.-Geography:...
  
  –Nakhon Ratchasima
  Nakhon Ratchasima Province
  Nakhon Ratchasima or , often shortened to Korat or Khorat , is one of the north-eastern provinces of Thailand...
  
  
• Route 207 : Phon
  Amphoe Phon
  Phon is a district in the southern part of Khon Kaen Province, northeastern Thailand.-Geography:Neighboring districts are Waeng Noi, Waeng Yai, Chonnabot, Non Sila and Nong Song Hong of Khon Kaen Province, Bua Lai and Prathai of Nakhon Ratchasima Province.-Administration:The district is...
  
  , Khon Kaen
  Khon Kaen Province
  -History:The first city of the area was established in 1783 when Rajakruluang settled there with 330 people. King Rama I made Rajakruluang the first governor of the area when establishing tighter connections with the Isan area. The main city was moved six times until in 1879 it reached its modern...
  
  -Non Daeng
  Amphoe Non Daeng
  Non Daeng is a district in the northeastern part of Nakhon Ratchasima Province, northeastern Thailand.-Etymology:The name of the district comes from Daeng trees -History:...
  
  , Nakhon Ratchasima
  Nakhon Ratchasima Province
  Nakhon Ratchasima or , often shortened to Korat or Khorat , is one of the north-eastern provinces of Thailand...
  
   via Ban Mai Chaiyaphot
  Amphoe Ban Mai Chaiyaphot
  Ban Mai Chaiyaphot is a district of Buriram Province, north-eastern Thailand.-History:The minor district Ban Mai Chaiyapho was created on April 1 1992 by splitting off five tambon from Phutthaisong district...
  
  , Buriram
  Buriram Province
  Buri Ram or is one of the north-eastern provinces of Thailand. Neighboring provinces are Sa Kaeo, Nakhon Ratchasima, Khon Kaen, Maha Sarakham and Surin. To the south-east it borders Oddar Meancheay of Cambodia...
  
  
• Route 208 : Maha Sarakham
  Maha Sarakham Province
  Maha Sarakham is one of the provinces of Thailand, located in the northeastern region of Thailand. Neighboring provinces are Kalasin, Roi Et, Surin, Buriram and Khon Kaen....
  
  -Khon Kaen
  Khon Kaen Province
  -History:The first city of the area was established in 1783 when Rajakruluang settled there with 330 people. King Rama I made Rajakruluang the first governor of the area when establishing tighter connections with the Isan area. The main city was moved six times until in 1879 it reached its modern...
  
   (Tambon Tha Phra)
• Route 209 : Khon Kaen
  Khon Kaen Province
  -History:The first city of the area was established in 1783 when Rajakruluang settled there with 330 people. King Rama I made Rajakruluang the first governor of the area when establishing tighter connections with the Isan area. The main city was moved six times until in 1879 it reached its modern...
  
  -Yang Talat
  Amphoe Yang Talat
  Yang Talat is a district in the western part of Kalasin Province, northeastern Thailand.-Geography:Neighboring districts are Huai Mek, Nong Kung Si, Mueang Kalasin, Khong Chai of Kalasin Province, Kantharawichai and Chiang Yuen of Maha Sarakham Province.-History:Originally named Pachim Kalasin ,...
  
  , Kalasin
  Kalasin Province
  Kalasin is one of the provinces of Thailand, located in the North-East of Thailand. Neighboring provinces are Sakon Nakhon, Mukdahan, Roi Et, Maha Sarakham, Khon Kaen and Udon Thani.-Geography:...
  
   (now superseded by Route 12)
• Route 210 : Wang Saphung
  Amphoe Wang Saphung
  Wang Saphung is a district in the central part of Loei Province, northeastern Thailand.-History:Khwaeng Wang Saphung was a satellite city of Mueang Lom Sak...
  
  , Loei
  Loei Province
  Loei is one of the most sparsely populated provinces of Thailand, located in the North-East. Neighboring provinces are Nong Khai, Udon Thani, Nongbua Lamphu, Khon Kaen, Phetchabun, Phitsanulok...
  
  –Udon Thani
  Udon Thani Province
  Udon Thani is one of the north-eastern provinces of Thailand. Neighboring provinces are Nong Khai, Sakon Nakhon, Kalasin, Khon Kaen, Nong Bua Lamphu and Loei.- Geography :...
  
  
• Route 211 : Chiang Khan
  Amphoe Chiang Khan
  Chiang Khan is a district in the northern part of Loei Province, northeastern Thailand.-Geography:Neighboring districts are Pak Chom, Mueang Loei and Tha Li of Loei Province...
  
  , Loei
  Loei Province
  Loei is one of the most sparsely populated provinces of Thailand, located in the North-East. Neighboring provinces are Nong Khai, Udon Thani, Nongbua Lamphu, Khon Kaen, Phetchabun, Phitsanulok...
  
  –Nong Khai
  Nong Khai Province
  Nong Khai is the northernmost of the north-eastern provinces of Thailand. Neighboring provinces are Bueng Kan, Sakon Nakhon, Udon Thani and Loei...
  
  
• Route 212 (Chayanggoon) : Nong Khai
  Nong Khai Province
  Nong Khai is the northernmost of the north-eastern provinces of Thailand. Neighboring provinces are Bueng Kan, Sakon Nakhon, Udon Thani and Loei...
  
  –Ubon Ratchathani
  Ubon Ratchathani Province
  -History:The area was part of the Khmer Empire. Before the late eighteenth century, this area evidently was outside Siamese or Thai Ayutthaya Kingdom....
  
  
• Route 213 (Thinanon Road) : Maha Sarakham
  Maha Sarakham Province
  Maha Sarakham is one of the provinces of Thailand, located in the northeastern region of Thailand. Neighboring provinces are Kalasin, Roi Et, Surin, Buriram and Khon Kaen....
  
  –Sakon Nakhon
  Sakon Nakhon Province
  Sakon Nakhon is one of the north-eastern provinces of Thailand. Neighboring provinces are Nong Khai, Nakhon Phanom, Mukdahan, Kalasin and Udon Thani...
  
   (now superseded by Route 12 only Yang Talat
  Amphoe Yang Talat
  Yang Talat is a district in the western part of Kalasin Province, northeastern Thailand.-Geography:Neighboring districts are Huai Mek, Nong Kung Si, Mueang Kalasin, Khong Chai of Kalasin Province, Kantharawichai and Chiang Yuen of Maha Sarakham Province.-History:Originally named Pachim Kalasin ,...
  
  -Somdet
  Amphoe Somdet
  Somdet is a district in the northeastern part of Kalasin Province, northeastern Thailand.-Geography:Neighboring districts are Huai Phueng, Na Mon, Mueang Kalasin, Sahatsakhan, Kham Muang of Kalasin Province and Phu Phan of Sakon Nakhon Province.-History:The minor district Somdet was created on...
  
  )
• Route 214 : Kalasin
  Kalasin Province
  Kalasin is one of the provinces of Thailand, located in the North-East of Thailand. Neighboring provinces are Sakon Nakhon, Mukdahan, Roi Et, Maha Sarakham, Khon Kaen and Udon Thani.-Geography:...
  
  –Chong Chom, Kap Choeng
  Amphoe Kap Choeng
  Kap Choeng is a district in the southern part of Surin Province, northeastern Thailand.-History:The village of Ban Kap Choeng is about 200 years old. It was originally under subdistrict Dan of Sangkha district, but 1937 was moved to Tambon Nong Yai, Prasat district...
  
  , Surin
  Surin Province
  Surin is one of the north-eastern provinces of Thailand. Neighboring provinces are Buriram, Maha Sarakham, Roi Et and Sisaket...
  
  
• Route 215 : Roi Et
  Roi Et Province
  Roi Et is one of the provinces of Thailand, located in the North-East of Thailand. Neighboring Provinces are Kalasin, Mukdahan, Yasothon, Sisaket, Surin and Maha Sarakham....
  
  –Tha Tum
  Amphoe Tha Tum
  Tha Tum is a district in the northern part of Surin Province, northeastern Thailand.-Geography:Neighboring districts are Rattanaburi, Sanom and Chom Phra of Surin Province, Satuek of Buriram Province, Chumphon Buri of Surin again, and Kaset Wisai and Suwannaphum of Roi Et...
  
  , Surin
  Surin Province
  Surin is one of the north-eastern provinces of Thailand. Neighboring provinces are Buriram, Maha Sarakham, Roi Et and Sisaket...
  
  
• Route 217 : Warin Chamrap
  Amphoe Warin Chamrap
  Warin Chamrap is a district in the western part of Ubon Ratchathani Province, northeastern Thailand.-Geography:Neighboring districts are Mueang Ubon Ratchathani, Sawang Wirawong, Na Yia, Det Udom, Samrong of Ubon Ratchathani Province and Kanthararom of Sisaket Province.The important water...
  
  -Sirindhorn
  Amphoe Sirindhorn
  Sirindhorn is a district of Ubon Ratchathani Province, Thailand. It is named in honor of HRH Princess Sirindhorn at her 36th birthday.-History:...
  
   (Ubon Ratchatani
  Ubon Ratchathani Province
  -History:The area was part of the Khmer Empire. Before the late eighteenth century, this area evidently was outside Siamese or Thai Ayutthaya Kingdom....
  
  )
• Route 218 : Mueang Buriram
  Amphoe Mueang Buriram
  Mueang Buriram is the capital district of Buriram Province, northeastern Thailand.-Geography:Neighboring districts are Prakhon Chai, Nang Rong, Chamni, Lam Plai Mat, Khu Mueang, Ban Dan, Huai Rat and Krasang of Buriram Province.-Administration:The district is subdivided into 19 subdistricts ,...
  
  -Nang Rong
  Amphoe Nang Rong
  Nang Rong is a district of Buriram Province, northeastern Thailand.-Geography:Neighboring districts are Chamni, Mueang Buriram, Prakhon Chai, Chaloem Phra Kiat, Lahan Sai, Pakham, Non Suwan and Nong Ki of Buriram Province.It is the closest major town to the Phanom Rung Historical Park, and 11th...
  
   (Buriram
  Buriram Province
  Buri Ram or is one of the north-eastern provinces of Thailand. Neighboring provinces are Sa Kaeo, Nakhon Ratchasima, Khon Kaen, Maha Sarakham and Surin. To the south-east it borders Oddar Meancheay of Cambodia...
  
  )
• Route 219 : Borabue
  Amphoe Borabue
  Borabue is a district in the central part of Maha Sarakham Province, northeastern Thailand.- Geography :Neighboring districts are Kosum Phisai, Mueang Maha Sarakham, Wapi Pathum, Na Chueak and Kut Rang.- History :...
  
  , Maha Sarakham
  Maha Sarakham Province
  Maha Sarakham is one of the provinces of Thailand, located in the northeastern region of Thailand. Neighboring provinces are Kalasin, Roi Et, Surin, Buriram and Khon Kaen....
  
  -Ban Kruat
  Amphoe Ban Kruat
  Ban Kruat is a district of Buriram Province, north-eastern Thailand.-History:The district was created in 1938 by splitting the single tambon Ban Kruat from Prakhon Chai district. It was, at first, a minor district...
  
  , Buriram
  Buriram Province
  Buri Ram or is one of the north-eastern provinces of Thailand. Neighboring provinces are Sa Kaeo, Nakhon Ratchasima, Khon Kaen, Maha Sarakham and Surin. To the south-east it borders Oddar Meancheay of Cambodia...
  
  
• Route 221, Sisaket (town) - Khao Phra Wihan National Park
  Khao Phra Wihan National Park
  Khao Phra Wihan National Park is a protected natural area in Sisaket Province, Thailand, that contains numerous ruins of the 11th century Khmer Empire. The park lies south of the town of Sisaket, at the end of Thai highway 221...
  
  
• Route 222 : Phang Khon
  Amphoe Phang Khon
  -Geography:Neighboring districts are Wanon Niwat, Phanna Nikhom, Waritchaphum and Sawang Daen Din.The Nam Un dam is located in the district.-History:...
  
  , Sakon Nakhon
  Sakon Nakhon Province
  Sakon Nakhon is one of the north-eastern provinces of Thailand. Neighboring provinces are Nong Khai, Nakhon Phanom, Mukdahan, Kalasin and Udon Thani...
  
  -Bueng Kan
  Amphoe Bueng Kan
  Mueang Bueng Kan is a capital district of Bueng Kan province, northeastern Thailand.-History:The district was originally named Chaiburi and was a part of Nakhon Phanom Province...
  
  
• Route 223 : Sakon Nakhon
  Sakon Nakhon Province
  Sakon Nakhon is one of the north-eastern provinces of Thailand. Neighboring provinces are Nong Khai, Nakhon Phanom, Mukdahan, Kalasin and Udon Thani...
  
  -That Phanom
  Amphoe That Phanom
  That Phanom is a district in the southern part of Nakhon Phanom Province, northeastern Thailand.The district is named after Wat Phra That Phanom, the most important Buddhist temple in the region.-Geography:...
  
  , Nakhon Phanom
  Nakhon Phanom Province
  Nakhon Phanom is one of the north-eastern provinces of Thailand. Neighboring provinces are Mukdahan, Sakon Nakhon and Bueng Kan. To the north-east it borders Khammouan of Laos.-Geography:...
  
  
• Route 224 : Nakhon Ratchasima
  Nakhon Ratchasima Province
  Nakhon Ratchasima or , often shortened to Korat or Khorat , is one of the north-eastern provinces of Thailand...
  
  –Kap Choeng
  Amphoe Kap Choeng
  Kap Choeng is a district in the southern part of Surin Province, northeastern Thailand.-History:The village of Ban Kap Choeng is about 200 years old. It was originally under subdistrict Dan of Sangkha district, but 1937 was moved to Tambon Nong Yai, Prasat district...
  
  , Surin
  Surin Province
  Surin is one of the north-eastern provinces of Thailand. Neighboring provinces are Buriram, Maha Sarakham, Roi Et and Sisaket...
  
  
• Route 225 : Chaiyaphum
  Chaiyaphum
  Chaiyaphum ) is a town in Northeastern Thailand, capital of Chaiyaphum province. As of 2006 it has a population of 37,490, and covers the full tambon Nai Mueang of Mueang Chaiyaphum district.-External links:...
  
  -Phetchabun
  Phetchabun
  Phetchabun is a town in Thailand, capital of the Phetchabun Province. It covers the tambon Nai Mueang of the Phetchabun district, along the Pa Sak River...
  
  -Nakhon Sawan
  Nakhon Sawan
  Nakhon Sawan is a city in Thailand, the name literally means "Heavenly City". The city is the capital of Nakhon Sawan Province, and covers the complete subdistrict Pak Nam Pho and parts of Khwae Yai, Nakhon Sawan Tok, Nakhon Sawan Ok and Wat Sai, all of Mueang Nakhon Sawan district...
  
  
• Route 226 : Nakhon Ratchasima
  Nakhon Ratchasima Province
  Nakhon Ratchasima or , often shortened to Korat or Khorat , is one of the north-eastern provinces of Thailand...
  
  –Ubon Ratchathani
  Ubon Ratchathani Province
  -History:The area was part of the Khmer Empire. Before the late eighteenth century, this area evidently was outside Siamese or Thai Ayutthaya Kingdom....
  
  
• Route 227 : Kalasin
  Kalasin Province
  Kalasin is one of the provinces of Thailand, located in the North-East of Thailand. Neighboring provinces are Sakon Nakhon, Mukdahan, Roi Et, Maha Sarakham, Khon Kaen and Udon Thani.-Geography:...
  
  -Phang Khon
  Amphoe Phang Khon
  -Geography:Neighboring districts are Wanon Niwat, Phanna Nikhom, Waritchaphum and Sawang Daen Din.The Nam Un dam is located in the district.-History:...
  
  , Sakon Nakhon
  Sakon Nakhon Province
  Sakon Nakhon is one of the north-eastern provinces of Thailand. Neighboring provinces are Nong Khai, Nakhon Phanom, Mukdahan, Kalasin and Udon Thani...
  
  
• Route 228 : Chum Phae
  Amphoe Chum Phae
  Chum Phae is a district of Khon Kaen Province, northeastern Thailand.-History:The area was occupied since prehistoric times. The ruins of the town Non Mueang date from the Dvaravati times....
  
  , Khon Kaen
  Khon Kaen Province
  -History:The first city of the area was established in 1783 when Rajakruluang settled there with 330 people. King Rama I made Rajakruluang the first governor of the area when establishing tighter connections with the Isan area. The main city was moved six times until in 1879 it reached its modern...
  
  –Mueang Nong Bua Lamphu
• Route 229 : Kaeng Khro
  Amphoe Kaeng Khro
  Kaeng Khro is a district in the eastern part of Chaiyaphum Province, northeastern Thailand.-History:The area was originally part of Phu Khiao district. It became a separate district on August 13, 1959....
  
  , Chaiyaphum
  Chaiyaphum Province
  Chaiyaphum is one of the north-eastern provinces of Thailand. Neighboring provinces are Khon Kaen, Nakhon Ratchasima, Lopburi and Phetchabun.- Etymology :...
  
  –Mancha Khiri
  Amphoe Mancha Khiri
  Mancha Khiri is a district in the southern part of Khon Kaen Province, northeastern Thailand.-Geography:Neighboring districts are Nong Ruea, Ban Fang, Phra Yuen, Ban Haet, Ban Phai, Chonnabot, Khok Pho Chai of Khon Kaen Province, Kaeng Khro and Ban Thaen of Chaiyaphum...
  
  , Khon Kaen
  Khon Kaen Province
  -History:The first city of the area was established in 1783 when Rajakruluang settled there with 330 people. King Rama I made Rajakruluang the first governor of the area when establishing tighter connections with the Isan area. The main city was moved six times until in 1879 it reached its modern...
  
  
• Route 230 (Mueang Khon Kaen
  Amphoe Mueang Khon Kaen
  Mueang Khon Kaen is the capital district of Khon Kaen Province, northeastern Thailand.-Geography:Neighboring districts are Ban Haet, Phra Yuen, Ban Fang, Ubolratana, Nam Phong, Sam Sung of Khon Kaen Province, Kosum Phisai and Chiang Yuen of Maha Sarakham Province.-History:In 1917, the district...
  
   Ring Road)
• Route 231 (Mueang Ubon Ratchathani
  Amphoe Mueang Ubon Ratchathani
  Mueang Ubon Ratchathani is the capital district of Ubon Ratchathani Province, northeastern Thailand.-History:The district was originally named Buphapala Nikhom...
  
   Ring Road)
• Route 232 (Mueang Roi Et
  Amphoe Mueang Roi Et
  Mueang Roi Et is the capital district in the western part of Roi Et Province, northeastern Thailand.- History :Mueang Roi Et is an ancient city. The area around the city was made into a district in 1908...
  
   Ring Road)
• Route 288 (Mueang Buriram
  Amphoe Mueang Buriram
  Mueang Buriram is the capital district of Buriram Province, northeastern Thailand.-Geography:Neighboring districts are Prakhon Chai, Nang Rong, Chamni, Lam Plai Mat, Khu Mueang, Ban Dan, Huai Rat and Krasang of Buriram Province.-Administration:The district is subdivided into 19 subdistricts ,...
  
   Ring Road)
• Route 290 (Mueang Nakhon Ratchasima
  Amphoe Mueang Nakhon Ratchasima
  Mueang Nakhon Ratchasima is one of 32 districts of Nakhon Ratchasima Province, Northeastern Thailand. Including the center city of district is City of Nakhon Ratchasima.-Introduction:...
  
   Ring Road)
• Route 2042 : Somdet
  Amphoe Somdet
  Somdet is a district in the northeastern part of Kalasin Province, northeastern Thailand.-Geography:Neighboring districts are Huai Phueng, Na Mon, Mueang Kalasin, Sahatsakhan, Kham Muang of Kalasin Province and Phu Phan of Sakon Nakhon Province.-History:The minor district Somdet was created on...
  
  , Kalasin
  Kalasin Province
  Kalasin is one of the provinces of Thailand, located in the North-East of Thailand. Neighboring provinces are Sakon Nakhon, Mukdahan, Roi Et, Maha Sarakham, Khon Kaen and Udon Thani.-Geography:...
  
  -Mukdahan
  Mukdahan Province
  Mukdahan is one of the north-eastern provinces of Thailand. Neighboring provinces are Amnat Charoen, Yasothon, Roi Et, Kalasin, Sakon Nakhon and Nakhon Phanom. To the east it borders the Mekong River, across which lies Savannakhet Province of Laos.-Geography:The province is located in the...
  
   (now superseded by Route 12)
• Route 2169 ( ): Yasothon
  Yasothon
  Yasothon is a town on the Chi River in the northeastern region of Thailand. It is the capital and administrative center of Yasothon Province and seat of its City District. Within this district, subdistrict Nai Mueang comprises the bounds of the town proper, which had a population of 21,134 in 2005...
  
   Route 23-Bypass north to Amphoe Sai Mun
  Amphoe Sai Mun
  -History:Sai Mun village was formerly a village of Amphoe Yasothon, when it was still part of Ubon Ratchathani Province. The village changed locations around the time of King Rama V when an epidemic caused villagers to abandon their homes and start a new village two kilometers away...
  
  –Kut Chum
  Amphoe Kut Chum
  Kut Chum is a district of Yasothon Province in northeastern Thailand.-History:The village of Kut Chum was established in 1912. A minor district Kut Chum was established on August 1, 1961...
  
  –Thai Charoen
  Amphoe Thai Charoen
  -History:Thai Charoen, formerly a subdistrict of Loeng Nok Tha, was established as a minor district on April 1, 1992, comprising 5 subdistricts formerly of Loeng Nok Tha....
  
  –Loeng Nok Tha
  Amphoe Loeng Nok Tha
  Loeng Nok Tha is a district of Yasothon Province in northeastern Thailand. Loeng Nok Tha town, the administrative center of the district, lies 69 km from Mueang Yasothon, and approximately 600 km from Bangkok.-History:...
  
  –Route 2047, thence east 5 km to NS Route 212.

Central Thailand

Central Thailand

Central Thailand is a region of Thailand, covering the broad alluvial plain of the Chao Phraya River. It is separated from North-East Thailand by the Phetchabun mountain range, and another mountain range separates it from Myanmar to the west. In the north it gently changes into the more hilly...

 including eastern region

• Route 3
  Sukhumvit Road
  Sukhumvit Road , or Thailand Route 3 , is a major road in Thailand, and a major surface road of Bangkok and other cities it winds through. It follows a coastal route from Bangkok to Trat and is just over in length....
  
  (Sukhumvit Road) : Bangkok–Trat
  Trat Province
  Trat is a province of Thailand. It is located in the east of Thailand, and has borders with Chanthaburi Province to the northwest, Cambodia to the east, and the Gulf of Thailand to the south.Trat is most famous for gemstone mining and trading....
  
   as .
• Route 31
  Vibhavadi Rangsit Road
  Vibhavadi Rangsit Road or Thailand Route 31, often informally called Vibhavadi Road , is a highway in Thailand. It is part of Thailand Route 301....
  
  (Vibhavadi Rangsit Road) : Bangkok–Pathum Thani.
• Route 32 Ayutthaya–Nakhon Sawan
  Nakhon Sawan Province
  Nakhon Sawan is one of the provinces of Thailand. Neighboring provinces are Kamphaeng Phet, Phichit, Phetchabun, Lop Buri, Sing Buri, Chai Nat, Uthai Thani and Tak.- Etymology :...
  
   as .
• Route 33 (Suwannason Road) : Saraburi
  Saraburi Province
  Saraburi is one of the central provinces of Thailand. Neighboring provinces are Lopburi, Nakhon Ratchasima, Nakhon Nayok, Pathum Thani and Ayutthaya. Saraburi has been an important town since ancient times...
  
  –Sa Kaeo
  Sa Kaeo Province
  Sa Kaeo is a province of Thailand.It is located in the east of Thailand. Neighboring provinces are Chanthaburi, Chachoengsao, Prachin Buri, Nakhon Ratchasima and Buri Ram...
  
   as .
• Route 34
  Bang Na Expressway
  The Bang Na Expressway , officially Burapha Withi Expressway , is a 54 km long six-lane elevated highway in Bangkok, Thailand...
  
  (Bang Na Expressway) : part of the Bang Na-Trat highway, Bangkok–Chachoengsao
  Chachoengsao Province
  Chachoengsao is a province of Thailand. Neighboring provinces are Prachin Buri, Sa Kaeo, Chanthaburi, Chon Buri, Samut Prakan, Bangkok, Pathum Thani and Nakhon Nayok. It also has a short coast to the Gulf of Thailand.-History:Chachoengsao or Paet Rio is a province in the Central region...
  
   as .
• Route 35 (Rama II Road) : Bangkok–Phetchaburi
  Phetchaburi Province
  Phetchaburi is one of the central provinces of Thailand. Neighboring provinces are Ratchaburi, Samut Songkhram and Prachuap Khiri Khan...
  
   as .
• Route 304 : Pak Kret
  Amphoe Pak Kret
  Pak Kret is a district in the northeastern part of Nonthaburi province, central Thailand.-Geography:The district is located in the northeast of the province...
  
  , Nonthaburi
  Nonthaburi Province
  Nonthaburi is one of the central provinces of Thailand. Neighboring provinces are Phra Nakhon Si Ayutthaya, Pathum Thani, Bangkok and Nakhon Pathom....
  
  –Nakhon Ratchasima
  Nakhon Ratchasima Province
  Nakhon Ratchasima or , often shortened to Korat or Khorat , is one of the north-eastern provinces of Thailand...
  
   as .
• Route 305 : Rangsit
  Rangsit
  Rangsit may refer to:*Rangsit, Prince of Chainat , Thai prince*Khlong Rangsit, a canal north of Bangkok*Rangsit, a city in Pathum Thani Province, Thailand*Rangsit University, a university in Pathum Thani Province, Thailand...
  
  –Nakhon Nayok
  Nakhon Nayok Province
  Nakhon Nayok is one of the central provinces of Thailand. Neighboring provinces are Saraburi, Nakhon Ratchasima, Prachinburi, Chachoengsao and Pathum Thani....
  
  .
• Route 306
• Route 307
• Route 308
• Route 309
• Route 310
• Route 311
• Route 314
• Route 315
• Route 316
• Route 317
• Route 318
• Route 319
• Route 320
• Route 321
• Route 322
• Route 323
• Route 324
• Route 325
• Route 326
• Route 327
• Route 329
• Route 330
• Route 331
• Route 332
• Route 333
• Route 334
• Route 335
• Route 336
• Route 338
• Route 340
• Route 341
• Route 343
• Route 344
• Route 345
• Route 346
• Route 347
• Route 348
• Route 349
• Route 350
• Route 351
  Thailand Route 351
  Prasoet Manukit Road or Thailand Route 351, commonly known as Kaset-Nawamin Road , is a highway in Bangkok, Thailand. It begins at Kasetsart Intersection on Phahonyothin Road, Chatuchak district, as a continuation after the end of Ngamwongwan Road, and runs east until its end at a three-way...
  
  
• Route 352
• Route 356
• Route 357
• Route 359
• Route 361
• Route 362
• Route 364
• Route 3278 (Seri Thai Road) : Min Buri
  Min Buri
  Min Buri is one of the 50 districts of Bangkok, Thailand. It is bounded by other Bangkok districts : Khlong Sam Wa, Nong Chok, Lat Krabang, Saphan Sung, and Khan Na Yao.-History:...
  
  -Bang Kapi
  Bang Kapi
  Bang Kapi is one of the 50 districts of Bangkok, Thailand. It is bounded by other Bangkok districts : Bueng Kum, Saphan Sung, Prawet, Suan Luang, Huai Khwang, Wang Thonglang, and Lat Phrao.-History:...
  
   (Bangkok).
• Route 3312 (Lam Luk Ka Road) : Rangsit
  Rangsit
  Rangsit may refer to:*Rangsit, Prince of Chainat , Thai prince*Khlong Rangsit, a canal north of Bangkok*Rangsit, a city in Pathum Thani Province, Thailand*Rangsit University, a university in Pathum Thani Province, Thailand...
  
  -Lam Luk Ka
  Amphoe Lam Luk Ka
  Lam Luk Ka is a district of Pathum Thani Province, central Thailand.-History:The name Lam Luk Ka originates from a fertile pond in the district named Bueng Lam Luk Ka. When the government created the district Lam Luk Ka in 1904, they cut the word Bueng off.-Geography:The district is located in a...
  
   (Pathum Thani).

Southern Thailand

Southern Thailand

Southern Thailand is a distinct region of Thailand, connected with the Central region by the narrow Kra Isthmus.-Geography:Southern Thailand is located on the Malay Peninsula, with an area around 70,713 km², bounded to the north by Kra Isthmus as the narrowest part of the peninsula. The...

 

• Route 4 (Phetkasem Road) : Bangkok–Sadao
  Sadao
  -Places:* Sadao, Sadao - Sadao District - Songkhla Province, Southern Thailand* Sadao, Buachet - Buachet District - Surin Province North-Eastern Thailand* Sadao, Nang Rong - Nang Rong District - Buriram Province North-Eastern Thailand...
  
   via Hat Yai
  Hat Yai
  Hat Yai is a city in southern Thailand near the Malaysian border. Located at , it has a population of 157,359 in the city itself and about 800,000 in the greater Hat Yai area. Hat Yai is the largest city of Songkhla Province, the largest metropolitan area in Southern, and third largest...
  
  .
• Route 41
  Thailand Route 41
  Route 41 starts at intersection with Route 4 in Chumphon Province. It goes southward passing through Surat Thani Province and Nakhon Si Thammarat Province. It ends at Phatthalung Province joining Route 4 again.-Route Details:...
  
  : Chumphon
  Chumphon Province
  Chumphon ) is one of the southern provinces of Thailand, at the shore of the Gulf of Thailand. Neighboring provinces are Prachuap Khiri Khan, Surat Thani and Ranong...
  
  –Phattalung.
• Route 42 : Songkhla
  Songkhla Province
  Songkhla is one of the southern provinces of Thailand. Neighboring provinces are Satun, Phatthalung, Nakhon Si Thammarat, Pattani and Yala. To the south it borders Kedah and Perlis of Malaysia....
  
  –Narathiwat
  Narathiwat Province
  Narathiwat is one of the southern provinces of Thailand. Neighboring provinces are Yala and Pattani. To the south it borders the Malaysian state of Kelantan. The southern railway line ends in this province that is one of the nation’s five provinces that borders Malaysia. The name of this...
  
  .
• Route 43 : Songkhla
  Songkhla Province
  Songkhla is one of the southern provinces of Thailand. Neighboring provinces are Satun, Phatthalung, Nakhon Si Thammarat, Pattani and Yala. To the south it borders Kedah and Perlis of Malaysia....
  
  –Pattani
  Pattani Province
  Pattani is one of the southern provinces of Thailand. Neighboring provinces are Narathiwat, Yala and Songkhla.-Geography:...
  
  .
• Route 44
  Thailand Route 44
  Route 44 is part of land bridge project. It starts at intersection with Route 4 in Krabi Province, running northeast, and ends at intersection with Route 401 in Surat Thani Province.-Route Details:...
  
  : Krabi
  Krabi Province
  Krabi is one of the southern provinces of Thailand, at the shore of the Andaman Sea. Neighbouring provinces are Phang Nga, Surat Thani, Nakhon Si Thammarat and Trang. The Phuket province to the west is also neighbouring, but without any land boundary...
  
  –Surat Thani
  Surat Thani Province
  Surat Thani is the largest of the southern provinces of Thailand, on the eastern shore of the Gulf of Thailand. Surat Thani means City of Good People, the title given to the city by King Vajiravudh ....
  
  .
• Route 401
  Thailand Route 401
  Thailand Route 401 is a highway in southern Thailand. It starts from the west coast of the Thai-Malay Peninsula at an intersection with Route 4 near Amphoe Takua Pa, Phang Nga Province....
  
  : Phang Nga
  Phang Nga Province
  Phang Nga is one of the southern provinces of Thailand, on the shore to the Andaman Sea. Neighboring provinces are Ranong, Surat Thani and Krabi. To the south is the Phuket province, but without land boundary to Phang Nga....
  
  –Nakhon Si Thammarat
  Nakhon Si Thammarat Province
  Nakhon Si Thammarat is one of the southern provinces of Thailand, at the eastern shore of the Gulf of Thailand...
  
  .
• Route 402
• Route 403
  Thailand Route 403
  Route 403 is a road in Thailand that is divided into 3 sections. The first section starts at Amphoe Mueang Nakhon Si Thammarat. It goes south-westward and join Route 41 at Suan Pak junction. The 2nd section starts at Chong Khao junction. It goes westward to Amphoe Thung Song, then goes southward...
  
  
• Route 404
• Route 406
• Route 407
• Route 408
• Route 409
• Route 410
• Route 411
• Route 412
• Route 414
• Route 415
• Route 417
• Route 418
• Route 4012
  Thailand Route 4012
  Route 4012 is a short route between Ban Tha Pae and Nakhon Si Thammarat Town. Its length is about 8 km.-Route Details:Route 4012 start at Ban Tha Pae, exactly the point Route 401 ends. It run southward to Nakhon Si Thammarat Town. It is 4-lane asphalt, 2 in each direction separated by a...
  
  : a short route between Ban Tha Pae and Nakhon Si Thammarat Town
  Amphoe Mueang Nakhon Si Thammarat
  Nakhon Si Thammarat is the capital district of Nakhon Si Thammarat Province in southern Thailand.-Geography:Neighboring districts are Pak Phanang, Chaloem Phra Kiat, Phra Phrom, Lan Saka, Phrom Khiri and Tha Sala...
  
  .
• Route 4054 (Padang Besar-Sadao Highway
  Padang Besar-Sadao Highway
  Padang Besar-Sadao Highway is a major highway in Songkhla Province of Thailand.- List of Junctions and Towns :...
  
  ) : Padang Besar
  Padang Besar (Thailand)
  Padang Besar is a border town of the Malaysia-Thailand border in the Sadao district, Songkhla province, Thailand. Since 2004 the municipality has had town status and covers parts of the subdistrict Padang Besar. In 2007 it had a population of 13,748.There is a road and rail border crossing into...
  
  –Songkhla
  Songkhla Province
  Songkhla is one of the southern provinces of Thailand. Neighboring provinces are Satun, Phatthalung, Nakhon Si Thammarat, Pattani and Yala. To the south it borders Kedah and Perlis of Malaysia....
  
  .
• Route 4106 (Pattani-Betong Highway
  Pattani-Betong Highway
  The Pattani-Betong Highway or National highway 410 is a major highway in Yala Province and Pattani Province of Thailand.- List of Junctions and Towns :...
  
  ) : Pattani
  Pattani Province
  Pattani is one of the southern provinces of Thailand. Neighboring provinces are Narathiwat, Yala and Songkhla.-Geography:...
  
  –Betong
  Betong, Thailand
  Betong is a town in southern Thailand, near the boundary to Malaysia. It is the capital of Betong district, the southernmost district of Yala Province. As of 2005, the town has a population of 24,688....
  
  .
• Route 4184 (Wang Prachan Road
  Wang Prachan Road
  Wang Prachan Road or National highway 4184 is a major road in Satun Province of Thailand.- List of Junctions and Towns :...
  
  ) (Sadao
  Sadao
  -Places:* Sadao, Sadao - Sadao District - Songkhla Province, Southern Thailand* Sadao, Buachet - Buachet District - Surin Province North-Eastern Thailand* Sadao, Nang Rong - Nang Rong District - Buriram Province North-Eastern Thailand...
  
  ).

(Please expand)

Route number signs

DOH signs for public highways (ทางหลวง, thang luang) are white squares with a black garuda

Garuda

The Garuda is a large mythical bird or bird-like creature that appears in both Hindu and Buddhist mythology.From an Indian perspective, Garuda is the Hindu name for the constellation Aquila and...

 (ครุฑ khrut) centered above the route number.
Signs near the beginning of a route may display the highway's name on a white rectangle above or below the square.
Highways bypassing city centres bear the principle route number marked "Bypass" in Thai (เลี่ยงเมือง), and sometimes also in English.

Department of Rural Roads

DORR rural roads do not follow the regional numbering scheme, above. Signs are gold-on-blue, with a two-letter province designation prefixed to the road number. Depicted is YS.4011, for a rural road in Yasothon Province

Yasothon Province

Yasothon is one of the provinces of Thailand, located in the North-East of Thailand on the Chi River. Neighboring provinces are Mukdahan, Amnat Charoen, Ubon Ratchathani, Sisaket and Roi Et.-Geography:...

. The rural road network measures some 35,000 km, about 82 percent of which is paved. The Department of Rural Roads of the Ministry of Transport takes care of the maintenance of all the rural roads in Thailand.

Milestones

Milestone as goal

Goal

A goal is an objective, or a projected computation of affairs, that a person or a system plans or intends to achieve.Goal, GOAL or G.O.A.L may also refer to:Sport...

is lakh chai (หลักชัย); also see Lak Mueang

Lak Mueang

Lak Mueang are City pillars found in most cities of Thailand. Usually housed in a shrine which is also believed to house Chao Pho Lak Mueang , the city spirit deity; it is held in high esteem by citizens....

, Lakh

Lakh

A lakh is a unit in the Indian numbering system equal to one hundred thousand . It is widely used both in official and other contexts in Pakistan, Bangladesh, India, Maldives, Nepal, Sri Lanka, Myanmar and is often used in Indian English.-Usage:...

.

or single-carriageway

Single carriageway

A single carriageway is a road with 1, 2 or more lanes arranged within a single carriageway with no central reservation to separate opposing flows of traffic. Two-lane road or two-lane highway are single carriageway with one lane for each direction...

 milestone facings display the route number on the outline of a garuda; some milestones also display the route number on top. Those located to the left of the carriageway count kilometers left to the road's beginning at KM 0; as seen on the right from the counter lane, the milestones go right on counting. On edges facing traffic, DOH milestones usually show distances remaining to the next two towns

Thesaban

Thesaban are the municipalities in Thailand. There are three levels of municipalities - city, town and subdistrict municipality. Both Bangkok and Pattaya are special municipal entities outside the thesaban system....

 (amphoe

Amphoe

An amphoe is the second level administrative subdivision of Thailand. Usually translated as district, amphoe make up the provinces, and are analogous to a county seat...

 seats or provincial

Provinces of Thailand

Thailand is divided into 76 provinces , which are geographically grouped into 6 regions. The capital Bangkok is not a province but a special administrative area and is included as the 77th province since it is administered at the same level as the other 76 provinces. The name of the provinces are...

 capitals.) Some edges, such as the one depicted to the left, have retroreflector

Retroreflector

A retroreflector is a device or surface that reflects light back to its source with a minimum scattering of light. An electromagnetic wave front is reflected back along a vector that is parallel to but opposite in direction from the wave's source. The device or surface's angle of incidence is...

 panels. Dual carriageway

Dual carriageway

A dual carriageway is a class of highway with two carriageways for traffic travelling in opposite directions separated by a central reservation...

 milestones or posts located in the median show only the kilometer number.

DORR milestones show the kilometer number, and the edges may show distances remaining to the next two villages.

Older roads built by the Ministry of the Interior Public Works Department (กรมโยธาธิการ กระทรวงมหาดไทย) have only department insigne and kilometer number, and do not show distances on their edges.

See also

• Thai motorway network
  Thai motorway network
  The Thai motorway network is an intercity motorway network that currently spans 145 kilometers. It is to be greatly extended to 4154.7 kilometers according to the master plan....
  
  
• Road signs in Thailand
  Road signs in Thailand
  Road signs in Thailand generally use warning signs as used in the United States, featuring the same black silhouette shapes.-Warning Signs:Warning signs warn of possible dangers or unusual conditions ahead and alert motorists on the hazards to expect...
  
  
• List of motor vehicle deaths in Thailand by year
• List of names of Thai highways (in Thai)

External links

• Asian / ASEAN Highway Route Marker (21MB) Department of Highways Thai-language 18-page file, with 1 index and 8 regional maps of AH system overlaid on existing Thai national highways, plus diagrams of AH route markers. Retrieved 2008-10-14.