extension at McCowan Road and Sheppard Avenue. Streetcars Toronto's streetcar system is one of the few in North America still operating along street-running tracks. It has been operating since the mid-19th century. Horsecar service started in 1861, and 600 V DC overhead electric service began in 1892. New TTC routes since the 1940s have generally been operated by other modes of transportation, and the less busy streetcar routes have also been converted. Streetcar routes are now focused on the downtown area, although two run farther from the core: one being on St. Clair Avenue, from Lake Ontario on average, served by the 512 St. Clair streetcar route, and another on Lake Shore Boulevard (the western portion of 501 Queen), which runs through the Etobicoke district nearly to the city limits with Mississauga. Up until 1995, the TTC operated a fleet of 765 PCC-type streetcars, 540 of which it purchased new. The rest were purchased as other cities sold their PCC streetcar fleets. From 1987 until September 2019, the TTC operated two-car Articulated Light Rail Vehicle (ALRV) streetcars, a longer version of the Canadian Light Rail Vehicle (CLRV) streetcars. Following the retirement of the TTC's CLRV streetcars on December 29, 2019, the entire TTC streetcar fleet consists of the low-floor Flexity Outlook vehicles from Bombardier Transportation, the first of which entered service on the 510 Spadina route on August 31, 2014. Services Fares Since March 1, 2015, children 12 and under have been able to ride the TTC for free year-round. The TTC's fare payment system consists of cash fares, Presto cards and Presto tickets. Although legacy fare media products, such as concession tickets (for youths ages 13 to 19 and seniors 65 or older), tokens, and physical day passes (including weekend family and group day passes) are no longer available for the general public to purchase from the TTC, they are still accepted as valid fare payments. As of January 1, 2019, TTC monthly passes and the 12-month pass are only available on Presto, following the phase-out of the TTC's own monthly Metropass and the Metropass discount plan (MDP). Since January 3, 2016, the adult cash fare has been $3.25 for a single trip. Since March 1, 2020, the cost of adult single fares using a Presto card has been $3.20. The Fair Pass program allows those eligible for the Ontario Disability Support Program (ODSP) or Ontario Works to receive