The Toronto Transit Commission (TTC) is a public transport agency that operates transit bus, streetcar, paratransit, and rapid transit services in Toronto, Ontario, Canada. Established in 1921, the TTC comprises  four rapid transit lines with 69 stations, over 149 bus routes, and 11 streetcar lines. In 4th quarter 2012, the average daily ridership was 2.76 million passengers: 1,425,300 by bus, 271,100 by streetcar, 46,400 by intermediate rail, and 1,011,700 by subway. The TTC also operates door-to-door paratransit service for the elderly and disabled, known as Wheel-Trans. The TTC is the third most heavily-used urban mass transit system in North America, after the New York City Transit Authority and Mexico City Metro.