Constanța (junction with A4) The A3 motorway, which is the largest motorway project in Eastern Europe with a length of 588 km from Bucharest to Oradea (near the Hungarian border), is open on 173 km. The segment Chețani—Câmpia Turzii (15.7 km) is under construction. All segments between Nădășelu and Oradea have been tendered by the end of 2020. The remaining sections are still in the planned phase. The A4 motorway is operational on 22 km, from Ovidiu to Agigea (also known as the Constanța bypass). Another 45 km are planned, from Agigea to Vama Veche (at the border with Bulgaria). The A6 motorway is also part of the Pan European IV Corridor, but near Lugoj it starts as the southern branch, that connects the cities of Sofia, Istanbul and Athens. It has a length of 270 km, of which 11.4 km between A1 and Lugoj bypass are open. The A7 motorway starts from the A3 (near Ploiești), linking it to the region of Moldavia and further to the Ukrainian border. From its planned 450 km, 16 km are open near Bacău, which serve as the bypass for that city. The A10 motorway is the first motorway which links two motorways in Romania: A1 (near Sebeș) and A3 (near Turda). It has 70 km, and since 2021, it has been operational on its entire length. The A11 motorway is a 135 km motorway, the second to connect A1 with A3 this time between Arad and Oradea, of which a 2.4 km stretch near Arad called the Arad bypass is open. Statistics According to the Romanian "Direcţia Regim Permise de Conducere şi Înmatriculare a Vehiculelor", in 2017 there were 7,635,000 vehicles (of which 1,320,230 in Bucharest), and 8,900,000 in 2019. It is estimated that by 2021 there will be more than 10 million registered cars in Romania. In 2016 62% of road fatalities occurred in urban area, Romania has 1189 fatalities in urban area, that is 60 killed in urban area per million inhabitants, or times more than EU average of 19. This makes Romania the EU member state with the most fatalities per million population, % more fatalities than the second country, Hungary. Metro 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