Sava River Bridge (A3)
Encyclopedia
The Sava Bridge is located between Kosnica
and Ivanja Reka
interchanges of the A3 motorway
near Zagreb
in Croatia
, spanning Sava River. It is 1064.5 metres (3,492.5 ft) long, and it comprises four traffic lanes and two emergency lanes. Construction work on the Sava Bridge started in 1977 and was opened to traffic in 1981. When completed, the bridge was the largest, in terms of its plan area, prefabricated girder bridge in Croatia. The bridge was designed by Zvonimir Lončarić and built by Hidroelektra, Zagreb.
The bridge is located in a horizontal curve comprising 4000 metres (13,123.4 ft) radius and a vertical convex curve of 20000 metres (65,616.8 ft) radius, as it crosses the river at a 76 degree angle relative to the riverbed. Due to the oblique angle of the crossing, the riverbed spanned is 230 metres (754.6 ft) wide at the point of the crossing. The deck surface exhibits symmetrical 2% grade towards the banks.
Between 2005 and 2010 a thorough rehabilitation of the bridge was performed to remedy some details, execution shortcomings recorded since 1981 and damage caused by intensive use of salt during winter use of the bridge.
in their annual bulletin on Croatian road traffic volume. Conversely, such information is gathered from time to time and made available through various published studies, published by the City of Zagreb
or Hrvatske ceste
. A study related to a proposed northern Zagreb bypass
specifies Annual average daily traffic (AADT)
of 36,393 on the A3 motorway section comprising the bridge. However, that figure applies to year 2004, and the adjacent motorway sections, where AADT is published regularly, display a 30% increase in traffic between 2004 and 2009, and a similar increase of traffic volume may be expected to be observed on the bridge.
Kosnica
Velika Kosnica is a village in Croatia. It is connected by the D3 highway at the A3 interchange....
and Ivanja Reka
Ivanja Reka interchange
The Ivanja Reka interchange is a cloverleaf interchange east of Zagreb, Croatia. The interchange represents the southern terminus of the A4 motorway and it connects the A4 route to the A3 motorway representing major a link in the Croatian motorway system. The interchange is a part of Pan-European...
interchanges of the A3 motorway
A3 (Croatia)
The A3 motorway is a major motorway in Croatia spanning . The motorway connects Zagreb, the nation's capital, to the Slavonia region and a number of cities along the Sava River. It represents a major east–west transportation corridor in Croatia and a significant part of the Pan-European Corridor...
near Zagreb
Zagreb
Zagreb is the capital and the largest city of the Republic of Croatia. It is in the northwest of the country, along the Sava river, at the southern slopes of the Medvednica mountain. Zagreb lies at an elevation of approximately above sea level. According to the last official census, Zagreb's city...
in Croatia
Croatia
Croatia , officially the Republic of Croatia , is a unitary democratic parliamentary republic in Europe at the crossroads of the Mitteleuropa, the Balkans, and the Mediterranean. Its capital and largest city is Zagreb. The country is divided into 20 counties and the city of Zagreb. Croatia covers ...
, spanning Sava River. It is 1064.5 metres (3,492.5 ft) long, and it comprises four traffic lanes and two emergency lanes. Construction work on the Sava Bridge started in 1977 and was opened to traffic in 1981. When completed, the bridge was the largest, in terms of its plan area, prefabricated girder bridge in Croatia. The bridge was designed by Zvonimir Lončarić and built by Hidroelektra, Zagreb.
Description
The bridge consists of three major sections. The southern foreshore is spanned by 39 metres (128 ft) prefabricated reinforced concrete girders freely supported across neoprene bearings on top of pier cap beams spanning 40 m (131.2 ft) + 12 x 41 m (134.5 ft) = 532 metres (1,745.4 ft). The central section of the bridge consists of cantilevers and suspended 39 metres (128 ft) prefabricated reinforced concrete girders, and is 328.5 metres (1,077.8 ft) long. The southern foreshore is spanned by a structure identical to the one on the northern foreshore, except it is shorter as it spans 40 m (131.2 ft) + 4 x 41 m (134.5 ft) = 204 metres (669.3 ft). Bridge piers are thin and slender to minimize any disruption to Sava River course. Bridge foundations are executed on "Benoto" piles. The bridge is executed as two parallel structure – each carrying one motorway carriageway.The bridge is located in a horizontal curve comprising 4000 metres (13,123.4 ft) radius and a vertical convex curve of 20000 metres (65,616.8 ft) radius, as it crosses the river at a 76 degree angle relative to the riverbed. Due to the oblique angle of the crossing, the riverbed spanned is 230 metres (754.6 ft) wide at the point of the crossing. The deck surface exhibits symmetrical 2% grade towards the banks.
Between 2005 and 2010 a thorough rehabilitation of the bridge was performed to remedy some details, execution shortcomings recorded since 1981 and damage caused by intensive use of salt during winter use of the bridge.
Traffic volume
Volume of traffic using the Sava River bridge is not reported regularly by Hrvatske cesteHrvatske ceste
Hrvatske ceste is a Croatian state-owned company pursuant to provisions of the Croatian Public Roads Act , the county and local roads are managed by county authorities, while the motorways are managed by Croatian Motorways Ltd and other concessionaires.The company is currently administered by a...
in their annual bulletin on Croatian road traffic volume. Conversely, such information is gathered from time to time and made available through various published studies, published by the City of Zagreb
Zagreb
Zagreb is the capital and the largest city of the Republic of Croatia. It is in the northwest of the country, along the Sava river, at the southern slopes of the Medvednica mountain. Zagreb lies at an elevation of approximately above sea level. According to the last official census, Zagreb's city...
or Hrvatske ceste
Hrvatske ceste
Hrvatske ceste is a Croatian state-owned company pursuant to provisions of the Croatian Public Roads Act , the county and local roads are managed by county authorities, while the motorways are managed by Croatian Motorways Ltd and other concessionaires.The company is currently administered by a...
. A study related to a proposed northern Zagreb bypass
Zagreb bypass
Zagreb bypass , is an U-shaped motorway partially encircling Zagreb, Croatia. The largest part by far, between Jankomir and Ivanja Reka interchanges, has been built between 1977 and 1979, while Ivanja Reka - Sveta Helena section has been built between 1996 and 1999. The bypass is long, tracing...
specifies Annual average daily traffic (AADT)
Annual average daily traffic
Average Annual daily traffic, abbreviated AADT, is a measure used primarily in transportation planning and transportation engineering. It is the total volume of vehicle traffic of a highway or road for a year divided by 365 days. AADT is a useful and simple measurement of how busy the road is...
of 36,393 on the A3 motorway section comprising the bridge. However, that figure applies to year 2004, and the adjacent motorway sections, where AADT is published regularly, display a 30% increase in traffic between 2004 and 2009, and a similar increase of traffic volume may be expected to be observed on the bridge.
| Dobra Bridge traffic volume | ||||
| Road | Counting site | AADT | ASDT | Notes |
| A3 | - | 36,393 | not available | Between Buzin and Ivanja Reka interchanges (2004) |