Municipal government of Toronto
On January 1, 1967, several of the smaller municipalities were amalgamated with larger ones, reducing their number to six. Forest Hill and Swansea became part of Toronto; Long Branch, Mimico, and New Toronto joined Etobicoke; Weston merged with York; and Leaside amalgamated with East York. This arrangement lasted until 1998, when the regional level of government was abolished and Etobicoke, North York, East York, York, and Scarborough were amalgamated into Toronto the "megacity". Mel Lastman, the long-time mayor of North York before the amalgamation, was the first mayor (62nd overall) of the new "megacity" of Toronto, which is the successor of the previous City of Toronto.
North York City Centre
The post-World War II period saw the rapid growth of the suburbs of Toronto. To accommodate the growth, the area was amalgamated into Borough of North York and Metropolitan Toronto in the 1950s. The large expansion of Ontario Highway 401, known as the Toronto Bypass, just to the south connected the district further by highway. The area was filled in by the 1960s with residential single-family subdivisions. By the 1960s, some high rise development was occurring, such as a Canadian Government Building at Yonge and Elmhurst Street and the twin-tower Sheppard Centre commercial and office complex at Yonge and Sheppard. The 1970s saw the extension of the Yonge–University line to Finch, connecting the area to downtown Toronto.