Metrolinx

Metrolinx is a Crown agency of the Government of Ontario that manages and integrates road and public transport in the Greater Toronto and Hamilton Area (GTHA), which comprises much of Ontario's Golden Horseshoe region. Headquartered at Union Station in Toronto, the agency was created as the Greater Toronto Transportation Authority on June 22, 2006. The agency adopted its present name as a brand name in 2007 and eventually as the legal name in 2009.

The agency is responsible for the Presto card, the electronic fare system used on public transport systems in the GTHA and on the OC Transpo in Ottawa. In 2009, Metrolinx assumed responsibility for GO Transit, the regional commuter rail and coach network. Metrolinx owns and operates the Union Pearson Express, the airport rail link connecting Toronto Pearson International Airport to Union Station. Metrolinx is also responsible for the construction of transit expansion projects worth nearly $30 billion in Toronto – including Line 5 Eglinton, the Ontario Line, the Line 1 Yonge subway extension into Richmond Hill, York Region, and the Line 2 Bloor–Danforth extension into Scarborough – following a 2020 agreement with the City of Toronto.