Zečeve Drage Viaduct
Encyclopedia
The Zečeve Drage Viaduct is located between the Bosiljevo 2
Bosiljevo 2 interchange
The Bosiljevo 2 interchange |A6 motorway]] and it connects the A6 route to the A1 motorway between Bosiljevo 1 and Ogulin exits. The interchange is a part of Pan-European corridor Vb. It also represents a part of European route E65.- See also :...

 and Vrbovsko
Vrbovsko
Vrbovsko is a town in western Croatia, situated at the far east of the mountainous region of Gorski kotar in the Primorje-Gorski Kotar county; on its 280 square kilometers area, Vrbovsko features 60 settlements and a total of 5,019 inhabitants...

 interchanges of the A6 motorway
A6 (Croatia)
The A6 motorway is a motorway in Croatia spanning . It connects the nation's capital, Zagreb, via the A1, to the seaport of Rijeka. The motorway forms a major north–south transportation corridor in Croatia and is a part of European route E65...

 in Gorski Kotar
Gorski kotar
Gorski kotar is the mountainous region in Croatia between Karlovac and Rijeka. Together with Lika and the Ogulin-Plaški valley it forms Mountainous Croatia. Because 63% of its surface is forested it is popularly called the green lungs of Croatia or Croatian Switzerland...

, 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 ...

, just to the west of the Veliki Gložac Tunnel
Veliki Gložac Tunnel
Veliki Gložac Tunnel is one of 13 tunnels found on the Croatian A6 motorway route. It is long and consists of two tunnel tubes. It is located between Vrbovsko and Bosiljevo 2 interchanges. The tunnel is tolled within the A6 motorway closed toll collection system. There are no other toll...

. It is 939.2 metres (3,081.4 ft) long. The viaduct consists of two parallel structures: the first one was completed in 2004, and the second one in 2008. The viaduct is tolled within the A6 motorway ticket system
Ticket system
A ticket system toll road A ticket system toll road A ticket system toll road (also known as closed toll collection system, as opposed to a flat-rate toll road, is utilized by some state toll road or highway agencies that allows a motorist to pay a toll rate based on the number of miles traveled...

 and there are no separate toll plazas associated with its use. The viaduct was completed by Viadukt
Viadukt
Viadukt is a Croatian company active in civil engineering, especially in fields of bridge, tunnel and road engineering. Other business activities of the company include building construction and reconstruction of urban streets....

.

Structure description

At this location the motorway route follows a horizontal curve with a radius of 2505.1 metres (8,218.8 ft). The deck of the viaduct follows a 26500 metres (86,942.3 ft) radius concave vertical curve, and the longitudinal grade of the road carried by the viaduct ranges from 4.38% to 0.78%. The viaduct is a box girder structure supporting the deck across nineteen spans: two of 40 m (131.2 ft), sixteen of 50 m (164 ft) and one of 40 m (131.2 ft). The viaduct piers range from 18.72 m (61.4 ft) to 53.04 m (174 ft) in height. The superstructure of the viaduct comprises a box cross section made from pre-stressed reinforced concrete, put in place by incremental launching due to the considerable height of the structure. The launching was carried out downhill, because of the substantial grade of the superstructure, with two VBT 19×140 cable stays as a braking mechanism for the 20000 tonnes (19,684.1 LT) box girder. The cross-sections of the box girder and the piers are virtually identical to those of Bajer Bridge
Bajer Bridge
Bajer Bridge is located between the Vrata and Oštrovica interchanges of the A6 motorway in Gorski Kotar, Croatia, spanning Lake Bajer. It is long. The bridge consists of two parallel structures: The first one was completed in 1995, and the second one in 2008. The bridge is tolled within the A6...

.

Traffic volume

Traffic volumes are regularly measured and reported by Autocesta Rijeka–Zagreb, the operator of the viaduct and A6 motorway where the structure is located, and published by 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...

. Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the bridge carries a large amount of tourist traffic to the Adriatic resorts. The traffic count is performed using analysis of motorway toll ticket sales.
Zečeve Drage Viaduct traffic volume
Road Counting site AADT ASDT Notes
A6 3022 Bosiljevo 2 west 11,448 19,401 Between Bosiljevo 2 and Vrbovsko interchanges.
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