Canada's first regional public transit system, GO Transit began regular passenger service on May 23, 1967 as a part of the Ontario Ministry of Transportation. Since then, it has grown from a single train line to seven, and expanded to include complementary bus service. GO Transit has been constituted in a variety of public-sector configurations, today existing as an operating division of Metrolinx, a provincial Crown agency with overall responsibility for integrative transportation planning within the Greater Toronto and Hamilton Area.