Dobra Bridge (A1)

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.

Not to be confused with Dobra Bridge (A6).
Dobra Bridge
Coordinates45.504903°N 15.460167°E / 45.504903; 15.460167
CarriesA1 motorway
CrossesDobra River
LocaleCentral Croatia
Official nameMost Dobra
Maintained byAutocesta Rijeka – Zagreb
Characteristics
DesignGirder bridge
Total length546 m
Width2 x 10.5 m
Longest span70 m
History
Opened2001
Statistics
Tollcharged as a part of A1 motorway toll

Construction work on the Dobra Bridge started in 1999 and was completed in 2001.[1] Cost of the construction work was 57 million Croatian kuna (7.7 million euro). During the construction there was one major incident: on 1 July 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.[2]

Description

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 m (115 ft) long. The bridge is executed as two parallel structures, each 10.5 m (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 cm (8.7 in) deep reinforced concrete deck slab. Foundations of the bridge are executed on piles.[1]

Traffic volume

Traffic is regularly counted and reported by Autocesta Rijeka – Zagreb, operator of the bridge and the part of the A1 motorway where the bridge is located, and published by Hrvatske ceste.[3] 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
Road Counting site AADT ASDT Notes
A1 1804 Karlovac south 21,699 43,188 Between Karlovac and Bosiljevo 1 interchanges.
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See also
  • List of bridges by length

References
  1. "Dobra Bridge - Rijeka-Zagreb Motorway" (in Croatian). Viadukt. Retrieved September 14, 2010.
  2. Antun Krešimir Buterin (October 29, 2000). "Motorway between Zagreb to Vukova Gorica ready in seven months - by the Croatian Statehood day" (PDF). Vjesnik (in Croatian). Retrieved September 14, 2010.
  3. "Traffic counting on the roadways of Croatia in 2009 - digest" (PDF). Hrvatske Ceste. May 1, 2010. Archived from the original (PDF) on 2011-07-21.
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