Interstate 184 is a short Interstate Highway spur route of Interstate 84 located in Idaho

Idaho

Idaho is a state in the Rocky Mountain area of the United States. The state's largest city and capital is Boise. Residents are called "Idahoans". Idaho was admitted to the Union on July 3, 1890, as the 43rd state....

. I-184 connects I-84 travelers to downtown Boise

Boise, Idaho

Boise is the capital and most populous city of the U.S. state of Idaho, as well as the county seat of Ada County. Located on the Boise River, it anchors the Boise City-Nampa metropolitan area and is the largest city between Salt Lake City, Utah and Portland, Oregon.As of the 2010 Census Bureau,...

. The western terminus of I-184 is with I-84; the eastern terminus 13th Street in downtown Boise, where I-184 empties eastbound traffic onto Myrtle Street and receives westbound traffic from Front Street. The Front/Myrtle couplet passes just south of the heart of downtown Boise and connects to Broadway Avenue 1/4 mile north of Boise State University

Boise State University

Boise State University is a public university located in Boise, Idaho. Originally founded in 1932 as a junior college by the Episcopal Church, the university became an independent institution in 1934, and has been awarding baccalaureate and master degrees since 1965...

. Between Chinden Boulevard and its eastern terminus I-184 is co-signed with U.S. Highway 20 and U.S. Highway 26.

History

Until 1980, the freeway was known on paper as Interstate 180N, when Interstate 84 was known as Interstate 80N. This was the only signed suffixed auxiliary Interstate route in the nation, though it was not upgraded to Interstate standards until after the parent route was renamed. Other suffixed routes around the country either were too short to merit an auxiliary route or used the unsuffixed route number for its auxiliary routes. This was illustrated by Interstate 80S in Pennsylvania, whose auxiliary routes were I-180, I-280, I-480, and I-680 respectively.

When Interstate 80N became Interstate 84, the road became Business Loop I-84 through Boise. The current I-184 designation was implemented when the construction upgrading the route to Interstate standards was completed in 1989. http://www.interstate-guide.com/i-184_id.html

Interstate 184 is the only three-digit interstate route in Idaho.

Exit list

The entire route is in Boise

Boise, Idaho

Boise is the capital and most populous city of the U.S. state of Idaho, as well as the county seat of Ada County. Located on the Boise River, it anchors the Boise City-Nampa metropolitan area and is the largest city between Salt Lake City, Utah and Portland, Oregon.As of the 2010 Census Bureau,...

, Ada County

Ada County, Idaho

Ada County is a county in the southwestern part of the U.S. state of Idaho. As of the 2010 Census, the county had a population of 392,365. The county seat and largest city is Boise, which is also the state capital. Other cities in the county with over 10,000 residents include Meridian, Eagle,...

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Mile	# Exit number An exit number is a number assigned to a road junction, usually an exit from a freeway. It is usually marked on the same sign as the destinations of the exit, as well as a sign in the gore....	Destinations	Notes
0.00		, Ontario Ontario, Oregon Ontario is the largest city in Malheur County, Oregon, United States. It lies along the Snake River at the Idaho border. The population was 10,985 at the 2000 census, with an estimated population of 11,245 in 2006...	Westbound exit and eastbound entrance
0.00	0		Westbound exit and eastbound entrance
1.08	1A	Franklin Road
1.33	1B	Cole Road	Westbound exit only
2.54	2	Curtis Road
2.81- 3.09	3	Fairview Avenue	No westbound exit
3.59- 3.81		, Western Idaho Fairgrounds	East end of I-184; westbound exit and eastbound entrance
4.29		River Street	Eastbound exit only
4.75			Eastbound exit and westbound entrance