The A1 motorway (Croatian: Autocesta A1) is the longest motorway in Croatia spanning 454.5 kilometers (282.4 mi). 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 Adriatic–Ionian motorway. Apart from Zagreb and Split, the A1 motorway runs near a number of major Croatian cities, provides either access to several national parks or nature parks and world heritage sites and numerous resorts, especially along the Adriatic Coast. The motorway is currently being extended south of Split to the port of Ploče and the city of Dubrovnik. National significance of the motorway is reflected through its positive economic impact on the cities and towns it connects as well as its importance to tourism in Croatia, however its genuine importance as a transit route shall be achieved upon completion of the Adriatic–Ionian motorway along the sections currently spanned just by the Adriatic Highway and two-lane roads in Slovenia and Albania connecting to the route.