In 1944, the TTC produced its plan “Rapid Transit for Toronto” calling for a full Yonge subway and a Queen Street streetcar subway. These plans were approved by the Board of Control and by the electorate in a referendum on January 1, 1946. The Yonge subway had priority and detailed engineering design was followed by construction with completion in 1954. An east-west station structure was provided under Queen station in anticipation of a future Queen Street streetcar subway, which never materialized.
An extract from 1944 TTC Rapid Transit Proposals for a Queen Street Route:
Plans and estimates of cost have been made covering two-track subway and open cut sections along Queen Street to be operated for a number of years as a trunk line for streetcar routes extending east, northeast, west and northwest beyond its portals. The open cut sections will be west of University Avenue and east of Church Street in the rear of the Queen Street frontage, connected by a subway under Queen Street between University Avenue and Church Street.
These open cut sections will extend through depreciated-value areas where there will be a pronounced economy in acquiring a private right-of-way a short distance north of Queen Street. The general features of the project conform to those described above for the subway on Yonge Street, the principal variation being the adoption of elevated construction across the Don River.
It is estimated that the maximum traffic on the Queen Street route, about 9,000 passengers per hour, could be carried with a combination of single cars and two-car trains operating on a headway of about 60 seconds, at speeds of about 15 m.p.h. (24 km/h) including stops. Capacity of this route, operated with trolley cars, will provide for substantial future increases in traffic, but with little sacrifice in speed. The Queen Street route, therefore, initially at least is being planned for streetcar operation.
An extension will be built in the west, partly in subway and partly in open cut, extending through Trinity Park to a connection with existing streetcar tracks on Dundas Street, a short distance east of Crawford Street. A similar extension will be made in the east along a right-of-way to be acquired adjacent to and just west of the Canadian National Railway to a connection with existing streetcar tracks at Gerrard Street and Carlaw Avenue.
This arrangement will result in benefit to every section of the east and west ends of the city. In the east, for example, will be routed not only Queen Street and Kingston Road cars. Special new direct routes from the Danforth districts, by which car riders can reach the downtown section, will be established instead of the present crosstown and transfer connections.
Similarly, in the west end, in addition to Queen cars and Dundas cars, other special new routes from the Dovercourt area, High Park and Runnymede districts will use the rapid transit line to get the greatest possible benefit of the new facilities.
The grades and alignments of both of these extensions will be such as to permit subsequent rapid transit extensions along Queen Street beyond the ends of the initial structures. The total length of route between connection to the Dundas Street tracks near Crawford Street to a connection to the tracks at Gerrard Street and Carlaw Avenue is 4.5 miles (7 km).
Subway structures are planned with sufficient vertical clearance to permit operation of cars using overhead trolleys.