Dominica's road network runs primarily along the coastline and along river valleys. Major roads are two-lane highways which connect the capital, Roseau, with Portsmouth (Edward Oliver Leblanc Highway) and the Douglas Charles Airport (Dr. Nicholas Liverpool Highway). It takes about 45 minutes to drive from Portsmouth to Roseau. Private minibuses form the major public transport system. These major roads were reconstructed from the early 2010s to 2015 with assistance from the People's Republic of China and the European Union.