The TransMilenio system was created during Enrique Peñalosa's mayoral term, and is a form of bus rapid transit that has been deployed as a measure to compensate for the lack of a subway or rail system. TransMilenio combines articulated buses that operate on dedicated bus roads (busways) and smaller buses (feeders) that operate in residential areas, bringing passengers to the main grid. TransMilenio's main routes are: Caracas Avenue, Northern Highway (''Autopista Norte''), 80th Street, Americas Avenue, Jiménez Avenue, and 30th Avenue (also referred to as ''Norte Quito Sur'' or ''N.Q.S.'' for short). Routes for Suba Avenue and Southern Highway (''Autopista Sur''), the southern leg of the 30th Avenue, were opened in April 2006. The third phase of the system will cover 7th Avenue, 10th Avenue, and 26th Street (or ''Avenida El Dorado''). The system is planned to cover the entire city by 2030. Although the Transmilenio carries commuters to numerous corners of the city, it is more expensive (US$0.80 or 2300 COP) than any public transport, except taxis.