History of Toronto
In 1998, the six municipalities comprising Metropolitan Toronto – East York, Etobicoke, North York, Scarborough, York, and the old City of Toronto – and its regional government were amalgamated into a single City of Toronto (colloquially dubbed the "megacity") by an act of the Government of Ontario. This was despite a municipal referendum in 1997 that was overwhelmingly against amalgamation. Subsequently, Mel Lastman defeated Barbara Hall to become the first elected mayor of the megacity.
Metropolitan Street Railway (Toronto)
On August 16, 1922, the City of Toronto formally acquired the T&YRR lines. The plan was that the city portions of the T&YRR radial lines would be incorporated into the TTC, and the portions outside the city would be managed by Ontario Hydro as the Hydro-Electric Railways: Toronto and York Division. 
On November 1, 1922, Hydro-Electric Railways took over operation of the T&YRR lines outside of the city limits. Hydro initiated a number of line improvements including track rehabilitation, a new station at Schomberg Junction, new waiting shelters, more passing sidings and additional service to Thornhill and Bond Lake Park.