Norway has approximately  of road network, of which  are paved and  are motorway. The four tiers of road routes are national, county, municipal and private, with national and primary county roads numbered en route. The most important national routes are part of the European route scheme. The two most prominent are the European route E6 going north–south through the entire country, and the E39, which follows the West Coast. National and county roads are managed by the Norwegian Public Roads Administration.