Kamačnik Bridge is located between the 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...

 and Ravna Gora

Ravna Gora, Croatia

Ravna Gora is a village in western Croatia, located between Delnice and Vrbovsko in the mountainous region of Gorski Kotar. It is the seat of a municipality whose total population is 2,439 , with 1,721 in Ravna gora itself and the rest in five smaller villages.-References:...

 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 ...

, spanning Kamačnik stream. It is 240 metres (787.4 ft) long. The bridge was designed by Zlatko Šavor. It consists of two parallel structures, both completed in 2003 by Konstruktor

Konstruktor

Konstruktor inženjering d.d. is a Croatian construction company founded in 1945 as "Konstruktor-Split" in Split, Yugoslavia ....

. The bridge 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 use of the bridge.

The bridge spans 60 metres (196.9 ft) deep Kamačnik stream bridge canyon which is legally protected as a listed landscape

Protected area

Protected areas are locations which receive protection because of their recognised natural, ecological and/or cultural values. There are several kinds of protected areas, which vary by level of protection depending on the enabling laws of each country or the regulations of the international...

. This prevents any construction on the canyon cliffs and in turn requires an asymmetrical structure across a span of approximately 125 metres (410.1 ft).

Structure description

At this location the motorway route follows a horizontal curve therefore the transversal grade of the deck is slightly increased. It is constant and equals 4.2%, while elevation grade of the bridge is constant at 5.7%, sloping down towards Vrbovsko. The bridge is a box girder structure supporting the deck across three spans. The southbound bridge spans are 71.18 m (233.5 ft) + 127.1 m (417 ft) + 23.9 m (78.4 ft). Its piers are 29 metres (95.1 ft) and 6.46 metres (21.2 ft) tall. The northbound bridge spans are 69.86 m (229.2 ft) + 127.74 m (419.1 ft) + 23.45 m (76.9 ft). Its piers are 23.17 metres (76 ft) and 7.5 metres (24.6 ft) tall. All of the piers comprise box cross section, 7.5 m (24.6 ft) (perpendicular to the bridge axis) by 4.5 m (14.8 ft) to 3.5 m (11.5 ft) (parallel to the bridge axis. The parallel bridge structures were built simultaneously.

Traffic volume

Traffic is regularly counted and reported by Autocesta Rijeka–Zagreb, operator of the viaduct and the 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 substantial tourist traffic to the Adriatic resorts. The traffic count is performed using analysis of motorway toll ticket sales.

Kamačnik Bridge traffic volume
Road	Counting site	AADT	ASDT	Notes
A6	3006 Vrbovsko west	11,979	20,091	Between Vrbovsko and Ravna Gora interchanges.