In addition to TransMilenio, the Peñalosa administration and voter-approved referenda helped to establish travel restrictions on cars with certain license plate numbers during peak hours called Pico y placa;  of Ciclovía on Sundays and major holidays; a massive system ( ) of bicycle paths and segregated lanes called ''ciclorrutas''; and the removal of thousands of parking spots in an attempt to make roads more pedestrian-friendly and discourage car use. ''Ciclorrutas'' is one of the most extensive dedicated bike path networks of any city in the world, with a total extension of . It extends from the north of the city, 170th Street, to the south, 27th Street, and from Monserrate on the east to the Bogotá River on the west. The ''ciclorruta'' was started by the 1995–1998 Antanas Mockus administration with a few kilometers, and considerably extended afterwards with the development of a Bicycle Master Plan and the addition of paths hundreds of kilometers in extent. Since the construction of the ''ciclorruta'' bicycle use in the city has increased, and a car free week was introduced in 2014.