on a single fare for two hours (including transfers to and from Brampton Transit, Züm, as well as TTC-operated bus routes in York Region north of Steeles Avenue only). Former fare zones On July 1, 2017, YRT removed fare zones allowing customers to travel within the region with only one fare. Previously, the YRT/Viva service area was divided into three fare zones. Zone 3 was defined as the portion of York Region north of Ravenshoe Road, and Zones 1 and 2 were divided by Bloomington Road for northbound passengers, just south of King Road for southbound passengers. Passengers crossing a zone boundary had to pay a zone fare supplement in addition to the regular fares. GO Transit co-fares As with many other transit agencies within the Greater Toronto and Hamilton Area (GTHA), YRT offers a reduced fare for passengers transferring to YRT or Viva buses from GO Transit under its "Ride to GO" program for those aged 13 and over. Passengers may transfer at a GO train station from a GO Transit route to a YRT bus route or TTC-operated bus routes in York Region (north of Steeles only) and receive free admission onto YRT so long as the passenger provides the GO Transit proof of payment ticket. Since Viva is operated on a proof-of-purchase system and single Viva fares are paid or purchased at curbside fare vending machines, riders must use a Presto card when transferring between Viva and GO Transit services in order to access the Ride to GO co-fare discount. Though Viva Purple and Viva Green do not directly serve Unionville GO Station, GO Transit co-fares are accepted when boarding either route at Enterprise Vivastation. Due to the proximity of Richmond Hill Centre Terminal and Langstaff GO Station, GO Transit co-fares are accepted for transfers between GO services at Langstaff GO station and YRT services at Richmond Hill Centre. The GO Transit co-fare discount is available to all passengers aged 13 and older who pay single YRT bus fares on their stored Presto card balance: passengers will automatically be assessed the co-fare (and any YRT or Viva fare supplements, if necessary) when transferring from GO Transit to YRT/Viva services regardless of where the passenger boards the YRT bus. Similarly, passengers transferring from YRT/Viva to GO Transit services will also be reimbursed the difference between the YRT fare and the co-fare upon disembarking from GO Transit (effectively, the