Mobility Plus was created in 2001 following the merger of the various transit agencies in York Region into YRT.
Most of the mobility system was inherited from Vaughan Transit and Markham Transit (Mobility Bus and Taxi Scrip), who operated similar systems since the 1980s.
Fixed routes are the Community Bus routes, a concept borrowed from the Toronto Transit Commission's Wheel-Trans community routes: York Region Mobility Bus can operate service to and within Toronto bounded by Toronto-Mississauga boundary, Steeles Avenue West, Yonge Street and Highway 401.
[1] YRT Mobility Plus operates a mix of 60 different vehicles: YRT MP also contracts out services to taxi companies to operate car and minivan based services: YRT MP also operates an unknown number of Toyota Camry or Chevrolet Impala in the fleet.
YRT leased 3 minivans to the contracts to complete the non-bus fleet.