spaces on the city's streets in order to regulate parking demand and ensure that parking spaces remain available for use. Some parking spaces managed by the city are dedicated to car-sharing programs such as Zipcar in order to reduce the necessity of car ownership. The SFMTA's Taxi and Accessible Service division oversees the regulation of taxis and paratransit services in the city. Nearly 2000 taxi medallions have been issued by the agency. Private transit services, such as Chariot, are also regulated by the agency and are required to operate routes that complement the city's transit services rather than compete with them. In addition to regulating private transit operators, the SFMTA has expressed interest in regulating vehicle for hire companies including Uber and Lyft, but the regulatory authority for in California lies with the California Public Utilities Commission. Funding Operating and capital funding for the SFMTA comes from a variety of sources. On the operating side, funding comes from San Francisco's general fund, transit passenger fares, fines and fees the agency charges, grants, and revenue from parking facilities. On the capital side, funding comes from at least 38 different sources at the local (San Francisco), regional (Bay Area), state, and federal levels. Funding from the general fund is affected by the 2014 Proposition B ballot measure, which tied the allocation from the general fund to the population growth in the city. The total operating revenue for 2017 was $1.063 billion, with around $206 million budgeted from transit fares, $293 million from the city's general fund, and $329 million from parking, fines, and fees. The capital budget was $829 million in 2017, with the vast majority of the funds going to the Central Subway project, transit expansion, and vehicle procurement and facility improvements. Specific sources of local and regional funding include the 2003 Proposition K sales tax, 2018's Regional Measure 3, and the 2010 Measure AA vehicle registration fee. Current capital projects The SFMTA is managing several large capital projects for improving transportation in San Francisco. These include: The Central Subway, which extended the T Third Street line of the Muni Metro to the Chinatown neighborhood via a 1.7 mile subway tunnel, three new underground stations, and one new above-ground station. Van Ness Bus Rapid Transit, the first bus rapid transit project to start construction in San Francisco. The project adds two miles of bus priority lanes on Van Ness Avenue. Geary