 According to the Romanian "Direcţia Regim Permise de Conducere şi Înmatriculare a Vehiculelor", in 2017 in Romania there were 7,635,000 vehicles from which 1,320,230 in Bucharest.Bucharest is the only city in Romania which has an underground railway system, comprising both the Bucharest Metro and the light rail system of the Regia Autonomă de Transport București.Although construction was planned to begin in 1941, decades of delays meant the Bucharest Metro was only opened in 1979.