up to 254,644 passengers throughout the entire system. In 2017, GO Transit ridership totalled 68.5million, and if expansion plans are realized, is projected to total over 200million by 2055. At least 91 per cent of the train ridership is to and from Union Station in downtown Toronto, while about 70% of all bus passengers travel to and from the City of Toronto. The average trip taken by a passenger is long. Most GO Transit commuters have a private vehicle available to them for their commute, but choose to use GO Transit instead. About 80% of train commuters and 60% of bus commuters choose GO Transit over driving. Over half of GO's ridership occurs on the Lakeshore West and East lines, which can be attributed to the almost continuous development along their corridors, as well as being the only two lines with two way, all day service since their inception. This is followed by the Milton line, carrying almost 14% of all ridership. Other corridors carry 4–11% of riders each. Fares Fares on the network are based on a zone tariff set between two specified points by GO Transit, and the type of passenger using the ticket. Tickets are sold for single trip, or passes for one day or one month. Tickets can be used on a GO train, bus, or a combination of both. They can be purchased at train stations, bus terminals and ticket agencies. Passenger categories exist for adults, youth, students, seniors and groups. As of March 9, 2019, passengers aged 12 and under can ride GO Transit fare-free. The Presto card, available on all GO trains and buses, is a unified smart card-based payment system used throughout the Greater Toronto and Hamilton Area. Presto is a sister operating division of Metrolinx and the card can also be used on numerous local transit agencies in the GTHA such as the Toronto Transit Commission (TTC) and York Region Transit (YRT) as well as on OC Transpo in Ottawa. As of March 14, 2022, free transfers to most connecting local transit systems throughout the GTHA (except TTC) - in many cases using a Presto card or contactless credit card and their associated mobile wallets (where accepted) - are included with the GO Transit fare. The Presto system allows passengers to load money on a reloadable card. Passengers pay their fare by "tapping" on and off on busses and trains. With