Compiled by Pete Coulman

May 11, 1968

Coincident with the extension of the BLOOR-DANFORTH SUBWAY to Islington, service begins on a new route connecting Prince Edward Drive north of Bloor Street to Old Mill station. Buses operate from Old Mill station via west on Bloor and north on Prince Edward to loop via east on Dundas, south on Earlington Avenue and west on Government Road. Service operates seven days a week, 18 hours a day. This route operates out of Queensway Garage.

The route is entirely in Zone 2, with normal pay-enter/free-leave system of fare collection, with transfer privileges to all connecting Zone 2 services. Passengers must pay a separate fare transferring between bus and subway at Old Mill station.

The round trip distance on this route is three miles, with a round trip time of 20 minutes. A single bus provides 20 minute service.

May 25, 1969

At the request of Etobicoke Council, through service is established along Prince Edward across Bloor Street. Outside of rush hours, the route is combined with 13 BERRY ROAD, operating from Dundas and Prince Edward to Humber Loop, via Prince Edward, Berry Road and Stephen Drive, diverting in both directions at Bloor Street to Old Mill Station. The new route is known as PRINCE EDWARD-BERRY ROAD. 66 PRINCE EDWARD buses operate during rush hours only.

During rush hours, a single bus provides 20 minute service over the northern Prince Edward section. Between rush hours, two buses provide half-hourly service on the combined route.

April 26, 1970

The combined PRINCE EDWARD-BERRY ROAD service is made permanent, with 66 PRINCE EDWARD absorbing 13 BERRY ROAD and operating as a single route. During rush hours, service is split in two branches with the original branch operating from Dundas to Old Mill station, and 66A operating over the old Berry Road route from Old Mill station to Dundas.

During rush hours, perhaps to clarify for passengers at Old Mill station which direction the bus was going, through service operates as two branches, with 66B operating "HUMBER TO DUNDAS (via Old Mill Station)" and 66C operating "DUNDAS TO HUMBER (via Old Mill Station).

February 3, 1974

On this date, a single bus provided 20 minute frequencies during rush hours on Prince Edward north of Bloor while three buses provided 12 minute frequencies on Prince Edward south of Bloor. Two buses provided 25 minute frequencies on the whole route off peak on weekdays, and 22 minute, 30 second frequencies on weekend and holidays.

A 66 PRINCE EDWARD transfer from April 16, 1985.

Circa 1986

Destination signs were changed to the following:

October 19, 1987

Service begins on a new rush-hour branch providing service on Park Lawn Road. Buses on the 66D branch operate from Old Mill station via west on Bloor, south on Prince Edward, east on Berry Road and south on Park Lawn to a new off-street loop located just south of Lake Shore Boulevard.

November 26, 1989

Weekday midday and evening service split at Old Mill station with service operated in the same configuration as during rush hour. Midday and evening service is added to the 66D "Lakeshore-Old Mill" branch. Buses on the "66 Dundas" branch will now provide a 15-minute clockface service from about 10:00 am to 3:00 pm and from 7:00 pm to 1:30 am. Service on the 66A and 66D branches remain unchanged.

April 24, 1991

On this date, on the 66 "Dundas" branch operates at 20-minute headways during rush hours and 15 minutes during weekday evenings and middays. Service on the 66A branch operates every 10 minutes during the morning rush hours, every 15 minutes during the afternoon rush hours and every 30 minutes during the midday and evenings. Buses on the 66D branch operate at the same frequencies as the 66A branch. Through service operates on the B/C branch only, using 2 buses to maintain 25-minute frequencies.

May 12, 1992

Weekday, mid-day and evening service via Park Lawn discontinued. 66D buses operate Monday to Friday rush hours only.

January 4, 1993 or later

In conjunction with the closure of Davenport garage, service transferred from Queensway garage to Lansdowne garage.

February 18th, 1996

As part of a series of system-wide service cuts resulting from the elimination of provincial public transit subsidies, all service on Prince Edward Drive north of Bloor Street discontinued. Service south of Bloor Street is discontinued after 10:00 p.m. on weekends and holidays. With the closure of Lansdowne garage, all base service operates out of Queensway garage.

November 17, 1996

Weekend and holiday late evening service is restored.

November 23, 2008

As part of the TTC's Ridership Growth Strategy, and to serve the new condo developments of Mimico, service on the 66D "Old Mill Stn-Lakeshore" branch is extended to serve the Humber Shores neighbourhood at all times of the week. Buses will operate south on Park Lawn, through the Park Lawn/Lakeshore bus loop, east on Lakeshore Blvd, south and west on Marine Parade Drive and north on Park Lawn Rd to the route. This new service operates every 14-16 minutes during rush hours and every 30 minutes at all other times.

The 66A and 66D branches combine to provide 15 minute or better service between Old Mill station and Berry Road and Park Lawn, seven days a week whenever the subway is open.

June 22, 2014

As part of a system-wide reorganization of route branch designations, southbound buses on the 66D "Park Lawn" branch are redesignated 66B.

June 19, 2017

Due to track, platform and electrical substation reconstruction at Humber Loop, service on the 66A "Humber Loop" branch is temporarily removed from Humber Loop, continuing east along the Queensway to Ellis Avenue. Buses loop via south on Ellis, west on Lake Shore Boulevard and north on Windermere to the Queensway. This routing change is expected to continue until December 17, 2017.

Document Archive

• A report on rerouting 66 PRINCE EDWARD around Marine Parade Drive, September 28, 2016 (PDF - 3.7 Mb)

66 Prince Edward Image Archive

	An official map of the TTC's 66 PRINCE EDWARD operations, effective June 1, 2013.
	An official TTC Orders and Notice describes the operation of 66 PRINCE EDWARD effective on its first day, May 11, 1968.
	The outside of the TTC's PRINCE EDWARD-BERRY ROAD timetable, effective May 25, 1969.
	TTC side rollsign for 66 PRINCE EDWARD. Note the directional 66B and 66C branches. Image courtesy Joseph Chemerys of the Rollsign Gallery.
	The outside of an official TTC timetable describing 66 PRINCE EDWARD operations, effective March 31, 1975.
	The inside of the TTC's 66 PRINCE EDWARD timetable for March 31, 1975. The schedule illustrates the difference in ridership north of Bloor versus south of Bloor. While rush hour service from Old Mill to Humber and back is frequent, service operates just every twenty minutes from Old Mill to Dundas.
	An unknown TTC GM "New Look" bus waits to pick up passengers at Old Mill station on opening day (May 11, 1968) for a run on 66 PRINCE EDWARD. Photo by D. Wilson, from the Pete Coulman Collection.
	TTC GM "New Look" bus #2990 operates on Bloor Street in 66 PRINCE EDWARD service, its roll sign showing its unique northbound-only branch ("Humber to Dundas"). This photograph was taken in the early 1970s by John Knowles and is courtesy the Keith Littlewood collection.
	TTC GM New Look bus #2991 picks up passengers at Humber Loop, about to start its run to Dundas as part of 66 PRINCE EDWARD. This 1972 photo is by P. Bateson; donated from the Pete Coulman Collection.
	TTC GM New Look bus #7184 rests at Queensway Garage, bearing a 66 PRINCE EDWARD rollsign exposure on August 27, 1976. Photo by Keith Littlewood, donated from the Pete Coulman Collection.
	TTC GM New Look #7185 lays over at Humber loop while in service on 66 PRINCE EDWARD in this early 1980s photograph snapped by John Calnan.
	Orion bus VII #8047 turns onto Prince Edward Drive South after having passed All Saints Church Kingsway. This bus is in service 66D PRINCE EDWARD route heading to Marine Parade Drive. Photo by Roman Fomin on July 2, 2013.
	TTC Orion VII bus #9050 pauses at Humber Loop in 66 PRINCE EDWARD service. This shot was taken by Damian Baranowski on September 22, 2019.
	TTC Orion VII bus #8059 sits at Humber loop in service on the 66 PRINCE EDWARD route on October 6, 2013. Photo by James Bow.
	TTC GM New Look bus #8112 pauses at Humber Loop in service on 66 PRINCE EDWARD in this mid-to-late 1980s shot by John Calnan.