The national and municipal governments regulate a system of private transit providers which operate bus lines around the city. There is the Ulaanbaatar Railbus.  There is also an Ulaanbaatar trolleybus system. A secondary transit system of privately owned microbuses (passenger vans) operates alongside these bus lines. Additionally, Ulaanbaatar has over 4000 taxis. The capital has  of road, of which 76.5 are paved.