Dobra Bridge (A1)
|Official name||Most Dobra|
|Maintained by||Autocesta Rijeka – Zagreb|
|Total length||546 m|
|Width||2 x 10.5 m|
|Longest span||70 m|
|Toll||charged as a part of A1 motorway toll|
The Dobra Bridge is located between Karlovac and Novigrad interchanges of the A1 motorway in Croatia, spanning Dobra River. It is 546 metres (1,791 ft) long, and it comprises four traffic lanes and two emergency lanes.
Construction work on the Dobra Bridge started in 1999 and was completed in 2001. Cost of the construction work was 57 million Croatian kuna (7.7 million euro). During the construction there was one major incident: On July 1, 2000, three girders plummeted from the main span piers into the river below. The incident did not cause any injury and damage was reported to be marginal.
The deck structure stretches across 13 spans. The main span is 70 metres (230 ft) long, while the remaining 12 spans are either 28 metres (92 ft) or 35 metres (115 ft) long. The bridge is executed as two parallel structures, each 10.5 metres (34 ft) wide. The bridge is a reinforced concrete plate gider structure, consisting of pretensioned reinforced concrete prefabricated I-section girders 180 centimetres (71 in) tall and a 22 centimetres (8.7 in) deep reinforced concrete deck slab. Foundations of the bridge are executed on piles.
Traffic is regularly counted and reported by Autocesta Rijeka – Zagreb, operator of the bridge and the A1 motorway where the bridge is located, and published by Hrvatske ceste. Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the bridge carries substantial tourist traffic to the Dalmatian Adriatic resorts. The traffic count is performed using analysis of motorway toll ticket sales.
|Dobra Bridge traffic volume|
|A1||1804 Karlovac south||21,699||43,188||Between Karlovac and Bosiljevo 1 interchanges.|
- "Dobra Bridge - Rijeka-Zagreb Motorway" (in Croatian). Viadukt. Retrieved September 14, 2010.
- Antun Krešimir Buterin (October 29, 2000). "Motorway between Zagreb to Vukova Gorica ready in seven months - by the Croatian Statehood day". Vjesnik (in Croatian). Retrieved September 14, 2010.
- "Traffic counting on the roadways of Croatia in 2009 - digest". Hrvatske Ceste. May 1, 2010.