The pan European corridor V, namely its leg Vb, is an important traffic route connecting Rijeka port with the European railway and road network. Equally important are corridor X and the Danubian corridor VII, running through Croatia. Thanks to them,, Rijeka and its port have much better traffic connection with the important markets in their hinterland. The network of Croatian motorways is the fastest and most reliable land connection between Rijeka port and its immediate and extended hinterland. The railway corridor links Rijeka, via Zagreb, with Hungary and Serbia. In addition to the road and rail connection, the oil pipeline, connecting the oil plants in Croatia, Hungary, Austria, Bosnia and Herzegovina, Serbia, Czech Republic and Slovakia, is also very important. International airport is situated in close vicinity of Rijeka, on the island of Krk.