A4 (Croatia)

The A4 motorway (Croatian: Autocesta A4) is a motorway in Croatia spanning 97.0 kilometres (60.3 mi). It connects the nation's capital, Zagreb, to the city of Varaždin and to Budapest, Hungary via the Goričan border crossing. The motorway represents a major north–south transportation corridor in Croatia and is a part of European routes E65 and E71. The A4 motorway route also follows Pan-European corridor Vb.

Apart from Zagreb and Varaždin, the A4 motorway runs near a number of Croatian cities, and connects to the rest of the Croatian motorway network east of Zagreb. The motorway route was completed in 2008. The motorway's national significance is reflected in the positive economic impact on the cities and towns it connects, as well as its importance to tourism in Croatia. The genuine importance of the motorway as a transit route will be demonstrated upon completion of proposed expansion of Port of Rijeka and Rijeka transport node, since the A4 represents an integral part of the Rijeka–Zagreb–Budapest transport route.

As the route traverses hilly terrain, it requires a substantial number of viaducts and tunnels, as well as two major bridges to span the Drava and Mura rivers. The motorway consists of two traffic lanes and an emergency lane in each driving direction separated by a central reservation. There are no emergency lanes in the tunnels. All intersections of the A4 motorway are grade separated. As of October 2010, there are 12 exits and 3 rest areas operating along the route. As the motorway is tolled using a ticket system, each exit includes a toll plaza. Exits south of the Sveta Helena mainline toll plaza have no toll plazas, as that part of the A4 route is not tolled. The same applies to the northernmost section between the Goričan exit and the Hungarian border.

A motorway connecting Zagreb to Varaždin and Budapest was proposed in the early 1970s, but unlike the Zagreb–Rijeka or Zagreb–Belgrade motorways, no construction was actually carried out. The first section of the road, later designated as the A4 motorway, was developed as a 6-kilometre (3.7 mi) two-lane road to serve as an interchange ramp in Ivanja Reka. The majority of the entire motorway was built between 1997 and 2003, leaving only a 1.6-kilometre (0.99 mi) section between the Goričan interchange and the Goričan–Letenye border crossing left to build. The section was fully completed on October 22, 2008. In 1998, construction costs were estimated at 850 million German marks (€434.5 million). Although a 32-year concession for development of the motorway was awarded to Transeuropska Autocesta d.d. (TEA) in 1997, Hrvatske autoceste took over development, maintenance and management of the route in 2000 when the concession was cancelled, leading to a dispute with Astaldi, the majority owner of TEA.