Drežnik Viaduct
Encyclopedia
The Drežnik Viaduct is located in Karlovac
, Croatia
, immediately to the south of the Karlovac interchange on the A1 motorway
. It is the longest viaduct in Croatia, spanning 2485 metres (8,152.9 ft). It is executed in seven segments (225 m (738.2 ft)+270 m (885.8 ft)+4x408 m (1,338.6 ft)+358 m (1,174.5 ft) long), separated by expansion joints. The viaduct was constructed by Konstruktor
, Split, as the main contractor, and Viadukt
and Hidroelektra of Zagreb
as subcontractors in 2000 and 2001.
The viaduct is executed as two parallel structures, each 10.5 m (34.4 ft) wide. Their superstructures are continuous structures with spans of 35 metres (114.8 ft) to 70 metres (229.7 ft) m above Kupa River. The carriageway of each of the bridges consists of two traffic lanes 3.75 metres (12.3 ft) wide and two marginal strips 1 metres (3.3 ft) wide. There are no sidewalks and no emergency lanes on the bridge itself. The superstructure is executed in I-section prefabricated reinforced concrete girders, made monolithic with in situ executed transverse beams and the deck slab. The longitudinal girders are mostly of a uniform length (traversing 35 m (114.8 ft) spans), except for those spanning the river and the longest, 70 m (229.7 ft) long span. Foundations of the viaduct are executed on piles.
Cost of the construction works related to the Drežnik Viaduct was 250 million Croatian kuna
.
The Drežnik Viaduct is the largest and the most significant structure on the Karlovac - Bosiljevo 1 section of the A1 motorway, which carries the transit traffic between Zagreb
in the north and Rijeka
and Split
in the south, and channels it away from the Karlovac city centre, dramatically reducing travel times between those cities and relieving traffic congestion from the D1 state road
running through Karlovac, which was especially severe during summer seasons.
. 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.
Karlovac
Karlovac is a city and municipality in central Croatia. The city proper has a population of 49,082, while the municipality has a population of 59,395 inhabitants .Karlovac is the administrative centre of Karlovac County...
, 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 ...
, immediately to the south of the Karlovac interchange on the A1 motorway
A1 (Croatia)
The A1 motorway is the longest motorway in Croatia spanning . As it connects Zagreb, the nation's capital, to Split, the second largest city in the country and the largest city in Dalmatia, the motorway represents a major north–south transportation corridor in Croatia and a significant part of the...
. It is the longest viaduct in Croatia, spanning 2485 metres (8,152.9 ft). It is executed in seven segments (225 m (738.2 ft)+270 m (885.8 ft)+4x408 m (1,338.6 ft)+358 m (1,174.5 ft) long), separated by expansion joints. The viaduct was constructed by Konstruktor
Konstruktor
Konstruktor inženjering d.d. is a Croatian construction company founded in 1945 as "Konstruktor-Split" in Split, Yugoslavia ....
, Split, as the main contractor, and 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....
and Hidroelektra 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...
as subcontractors in 2000 and 2001.
The viaduct is executed as two parallel structures, each 10.5 m (34.4 ft) wide. Their superstructures are continuous structures with spans of 35 metres (114.8 ft) to 70 metres (229.7 ft) m above Kupa River. The carriageway of each of the bridges consists of two traffic lanes 3.75 metres (12.3 ft) wide and two marginal strips 1 metres (3.3 ft) wide. There are no sidewalks and no emergency lanes on the bridge itself. The superstructure is executed in I-section prefabricated reinforced concrete girders, made monolithic with in situ executed transverse beams and the deck slab. The longitudinal girders are mostly of a uniform length (traversing 35 m (114.8 ft) spans), except for those spanning the river and the longest, 70 m (229.7 ft) long span. Foundations of the viaduct are executed on piles.
Cost of the construction works related to the Drežnik Viaduct was 250 million Croatian kuna
Croatian kuna
The kuna is the currency of Croatia since 1994 . It is subdivided into 100 lipa. The kuna is issued by the Croatian National Bank and the coins are minted by the Croatian Monetary Institute....
.
The Drežnik Viaduct is the largest and the most significant structure on the Karlovac - Bosiljevo 1 section of the A1 motorway, which carries the transit traffic between 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 the north and Rijeka
Rijeka
Rijeka is the principal seaport and the third largest city in Croatia . It is located on Kvarner Bay, an inlet of the Adriatic Sea and has a population of 128,735 inhabitants...
and Split
Split (city)
Split is a Mediterranean city on the eastern shores of the Adriatic Sea, centered around the ancient Roman Palace of the Emperor Diocletian and its wide port bay. With a population of 178,192 citizens, and a metropolitan area numbering up to 467,899, Split is by far the largest Dalmatian city and...
in the south, and channels it away from the Karlovac city centre, dramatically reducing travel times between those cities and relieving traffic congestion from the D1 state road
D1 (Croatia)
The state road D1 is a national highway in Croatia. It is a one-lane highway that spans from Macelj border crossing in the north via Krapina, Zagreb, Karlovac, Slunj, Gračac, Knin, Sinj, ending in Split...
running through Karlovac, which was especially severe during summer seasons.
Traffic volume
Traffic is regularly counted and reported by Autocesta Rijeka - Zagreb, operator of the viaduct and the A1 motorway where the structure is located, and published 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...
. 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.
| Drežnik Viaduct traffic volume | ||||
| Road | Counting site | AADT | ASDT | Notes |
| A1 | 1804 Karlovac south | 21,699 | 43,188 | Between Karlovac and Bosiljevo 1 interchanges. |