In 1966, plans were made to replace all streetcar routes with buses in the next 20 years. The plan was cancelled in 1972 and streetcar routes were rebuilt. In 1970, GO Transit was established by the Government of Ontario with Gray Coach serving as its operator for most of its routes. The TTC operated its first dial-a-bus services under GO Transit in 1973. In 1975, the first paratransit service, Wheel-Trans, was established by a private operator. The TTC also began using minibuses for minor routes, which would be replaced by regular buses by 1981.