Following opening of new double-track car line on the Lake Shore Road, the QUEEN bus route was renamed MIMICO and extended south on Church Street (now Royal York Road) in Mimico, to wye at Albani Street, one block north of Lake Shore Road.
June 26th, 1929
Eastern terminus changed to Queen Street West (now the Queensway) & Lake Shore during normal hours instead of at Humber Loop east of the Humber River at Jane Street (now the South Kingsway). Rush hour route from Humber Loop unchanged.
May 4th, 1931
Due to construction of a new Humber River bridge, rush hour service from Humber Loop discontinued. All buses now turn at Queen & Lake Shore.
May 23rd, 1931
Rush hour service to and from Humber Loop at Jane & Lakeshore resumed, using the radial railway bridge.
July 29th, 1931
New Humber Loop opened, on west side of the Humber River at Middle Road (present location of the Queen Elizabeth Way).
MIMICO
LAKE SHORE HUMBER
sign assumed
July 19th, 1940
Due to construction of the Queen Elizabeth Way, service temporarily extended east on Lake Shore to Windemere Loop.
August 17th, 1940
With the opening of the Q.E.W. west from the Humber, service resumes to (the third) Humber Loop, although it had been opened to streetcar traffic from July 10th.
July 1st, 1954
Toronto Transit Commission operation commences, with the route based at Parkdale garage.
January 4th, 1956
Due to the Queensway being closed to vehicular traffic between Park Lawn Road and Grand Avenue for replacement of the Mimico Creek bridge, a split-service operation is put into effect. West section runs from Church & Albani via north on Church and east on the Queensway, looping couterclockwise via north on Woodford Park Road, west on Daniels Street and south on Burma Drive. The east section runs west from Humber Loop along the Queensway and north on Park Lawn, looping counterclockwise via east on Ringley Avenue, north on Francis Avenue and west on Waniska Avenue, operating only between 7:00 a.m. and 7:00 p.m.
January 11th, 1956
East section of split service now runs west on the Queensway, north on Park Lawn and west on Lorne Avenue to wye at Bonnyview Drive. This change causes less inconvenience to passengers in connecting to the west section of the route by reducing the distance of the walking connection.
November 2nd, 1956
Normal through routing resumes.
November 8th to 16th, 1956
Service diverted both ways around the intersection of Church & the Queensway via the Queensway, Dayton Avenue & Sinclair Street due to street repaving.
November 19th, 1956
Service diverted both ways via the north roadway of the Queen Street Extension to Windemere Loop due to construction work on the Queen Street Extension and the fourth Humber Loop.
January 2nd, 1957
Western terminus moved from a wye at Church & Albani across Lake Shore Road to wye at Church & Sussex Drive. "Vehicles will conduct the wye in one movement from the far-side southbound stop to the nearside northbound stop by turning east onto Sussex and backing south on Church and will lay in at the nearside northbound stop for time."
March 31st, 1957
Assigned route number 55.
MIMICO
55
LAKE SHORE HUMBER
sign assumed
April 15th, 1957
Service extended east on the Queen Street Extension and south on Ellis Avenue to the new Ellis Loop on the northeast corner of Lake Shore & Ellis, due to the Windemere Loop property being required for Gardiner Expressway construction (per TTC notice No. 996-U).
July 21st, 1957
In connection with the continuing construction of the Queen Street Extension and opening of the fourth Humber Loop, Ellis Loop is abandoned. Use of the new Humber Loop (just northwest of the old Loop and Canadian National Railway tracks) commenced at this time (per TTC notice No. 1067-U).
October 14th, 1957
MIMICO buses cease to wye at Sussex, instead looping counterclockwise via northeast on Lake Shore and west on Lake Crescent (per TTC notice No. 1128-U).
January 1st, 1961
Church Street (Mimico), Royal York Road South and Royal York Road North renamed Royal York Road, from Lake Ontario to Dixon Road.
September 1st, 1963
MIMICO route replaced by new 73 ROYAL YORK bus and a revised 80 QUEENSWAY service. 55 MIMICO name and number discontinued.
