The city's roads are usually very crowded during rush hours, due to an increase in car ownership in recent years. In 2013, the number of cars registered in Bucharest amounted to 1,125,591. This results in wear and potholes appearing on busy roads, particularly secondary roads, this being identified as one of Bucharest's main infrastructural problems. A comprehensive effort on behalf of the City Hall to boost road infrastructure was made, and according to the general development plan, 2,000 roads have been repaired by 2008. The huge number of cars registered in the city forced the Romanian Auto Registry to switch to 3-digit numbers on registration plates in 2010.