Compiled by Peter Coulman
Originally appeared on [Alan Gryfe's Transit History website](http://www.angelfire.com/ca/TORONTO/history/routesalpha.html)
With additions by Chris Gory

Proposals to serve the Warren Park area first materialized in the mid-to-late 70s. Initially, it was proposed that a bus run up Humbercrest Boulevard into the Warren Park area, but the condition of Humbercrest Boulevard made this impossible. Another proposal called for a bus run north on Jane Street and west on St. Mark's Road into Warren Park.

May 25, 1987

New seasonal rush-hour-only route, running from Jane Station via north on Jane Street and west on Dundas Street, looping clockwise through Warren Park via southeast on Gooch Avenue, southwest on Van Stassen Boulevard, northwest on Varsity, southwest on Crosby Avenue, northwest on Warren Crescent and Lundy Avenue, northeast on Old Dundas Street and east on Dundas. Service provided every 30:00 minutes.

October 16, 1987

Last day of operation for the year.

May 24, 1988

Service resumed for the season.

November 19, 1988

Last day of operation for the year.

May 23, 1989

Service resumed for the season.

November 24, 1989

Last day of operation for the year. The condition of Old Dundas prevented running service on this route year round. As service was removed for another winter, proposals reemerged to run a bus from Jane station via Jane and St. Marks Drive. However, it was felt that the grade on St. Marks was unsuitable for buses. Reconstruction of Old Dundas next year allowed year-round service to be established.

May 22, 1990

Service resumed for the season.

November 29, 1990

Year-round service now provided. Buses run over the same route as before throughout the year.

June 19, 2006

Service currently operates at 30 minute intervals during Monday to Friday rush hours only.

November 23, 2008

As part of the TTC's Ridership Growth Strategy, service times are increased so that this bus operates seven days a week, whenever the subway is open. Route switched to the newly-opened Mount Dennis Garage.

May 12, 2019

Due to disruptions anticipated from the reconstruction of the bus roadway at Jane Station, service on 55 WARREN PARK is extended from Bloor and Jane to Old Mill station. Buses operate over the normal route to Bloor and Jane and then travel west on Bloor and north on Old Mill Trail to Old Mill station, returning via Old Mill Trail and Bloor to Jane. Buses will serve two temporary stops, a southbound one between Old Mill Drive and Jane, and a northbound stop on Jane Street in front of the main entrance to Jane station. This change was originally supposed to take place on Sunday, March 31, 2019, but delays to the roadway construction led the TTC to delay this change to the start of the next board period. This temporary extension is expected to last for seven months.

November 23, 2019

Last day of operation to Old Mill station. With the completion of work at Jane station, service into that station is restored.

January 5, 2020

Service on this route is transferred to Queensway Garage.

55 Warren Park Image Archive

	A map of the TTC's 55 WARREN PARK operations, effective January 1, 2013.
	TTC Orion VII "Next Gen" bus, painted in the new livery, heads southbound on Jane Street in 55 WARREN PARK service. This 2017 photograph was taken by Alex Johnny.
	TTC Orion VII Hybrid #1523 waits to turn west from Jane Street onto Dundas Street West during service on the 55 Warren Park route. Photo taken on April 4, 2010 by Andrew Barton.
	TTC Orion VII "Next Gen" bus 1596 moves west on Old Dundas Street entering quiet residential neighbourhood of Warren Park (part of Lambton neighbourhood). Photo was taken by Roman Fomin on May 23, 2013.
	TTC Orion VII hybrid bus #1623 pulls out from its bay to go on a run for 55 WARREN PARK on the afternoon of March 29, 2017. Photo by James Bow.