Compiled by Jeffrey Kay

February 9, 1989

Overnight services on Yonge Street are now designated as route 320 YONGE instead of 97B YONGE, bringing the route in line with the newly established network of Blue Night services. Service is provided on Yonge Street between Steeles Avenue and Lake Shore Boulevard. At the north end buses turn back in the off-street loop on the south side of Steeles, just east of Yonge. The downtown looping is south on Yonge, west on Lake Shore, north on Bay and east on Front. Early Sunday morning (between 6 and 9 am), short turn buses run from Lake Shore north to York Mills Station only. Buses operate out of Eglinton and Wilson Garages.

Beginning on September 6, 1988 (or early as May 1988)

Additional trips were operated between Lake Shore and York Mills station in the early hours of Tuesday through Sunday until about 3.30 am. Some later trips ran north from Lake Shore to Eglinton until 4 am. This pattern of operation lasted until at least late 1992 but it is not known for how many years after this, that the operation of these short trips continued.

March 31, 1991

The downtown loop is expanded a block to the south and buses now loop south on Yonge, west on Queens Quay, north on Bay and east on Front. No change in rollsigns.

August 1, 2004

Early morning trips operate in both directions via Eglinton Station, seven days a week, so that customers can easily transfer to and from other routes within the station.

September 5, 2004

To provide additional service to the “Entertainment District” after hours, some trips are extended at the south end of the route, up University Avenue. Service operates every half hour. Buses operate via south on Yonge, west on Front, north on University, to loop around Queen’s Park Circle, returning over the reverse route via University, Front and Yonge to Steeles.

November 25, 2006

The extension to Queen’s Park Circle via University is discontinued due to low ridership.

November 23, 2008

Buses are now shared with Eglinton, Wilson and the newly-opened Mount Dennis Garage.

October 13, 2013

Service on Yonge Boulevard is eliminated on this date, ending the 320A branch. All service is routed north on Yonge Street to Steeles Avenue. Buses on the main branch are scheduled to operate every 3 minutes, 30 seconds from 1:30 a.m. to 3:30 a.m. and every 3 minutes Sunday mornings from 6 a.m. to 9 a.m.

January 3, 2016

A temporary route change made due to construction at Union Station is made permanent to provide “more direct and convenient service for more customers.” At the south end, buses will officially loop from Yonge and Wellington via west on Wellington, south on Bay, east on Queen’s Quay and north on Yonge Street. This officially replaces the old loop of south on Yonge, west on Queen’s Quay, north on Bay and east on Front. No change to destination signs.

March 28, 2021

Some runs are provided by the newly-opened McNicoll Garage in addition to Eglinton, Mount Dennis and Wilson Garages.

320 Yonge Night Image Archive

	A scan of the TTC Riders News for January/February 1987, announcing the Blue Night route revision. Image courtesy Pete Coulman.
	TTC Orion VII "Next Gen" bus #8305 pulls up to the southbound Lawrence stop in service on the 320 YONGE NIGHT route. James Bow took this photograph early on Sunday, August 31, 2014.
	An official TTC map of 320 YONGE NIGHT operations effective January 3, 2011.
	TTC GM New Look rebuild #2092 operates along Yonge, approaching Cummer, in service on the 320 YONGE NIGHT route on November 24, 2005. Photo by Rob Hutchinson.
	In this black and white shot, TTC GM New Look rebuild #2459 operates southbound on Yonge past Dundas Square, in service on the 320 YONGE NIGHT bus on April 18, 2005. Photo by Rob Hutchinson.
	With the subway closed until 9 a.m. on Sundays, it was quite possible to catch 320 YONGE night buses operating well past sunrise. Buses operated more frequently the closer to the opening of the subway and, back in the early 1990s, articulated buses were used. Here, Orion Icarus articulated 6410 heads up Yonge Street out of the downtown. The bus appears to have quite a crowd inside. This photograph was taken on August 20, 1989 by Bob Hussey.
	TTC Orion VII bus #7582 pulls up to Lawrence Avenue, running southbound on 320 YONGE NIGHT on Sunday, August 31, 2014. The photo is by James Bow.
	TTC Orion VII "Next Gen" bus #8204 crosses Lawrence, northbound in service on 320 YONGE NIGHT on Sunday, August 31, 2014. Photo by James Bow.
	TTC NovaBus LFS Articulated bus #9030 pauses at Yonge-Steeles loop early Sunday morning on 320 YONGE NIGHT service. This shot was taken in 2018 by Steven Sun.
	TTC Orion VI bus #9228 prepares to turn from Yonge to Queens Quay in service on the 320 YONGE NIGHT bus on March 27, 2006. Photo by Rob Hutchinson.
	TTC Orion V bus #9426 heads northbound on Yonge Street, approaching Bloor, early Sunday morning on June 21, 2015, in service on the 320 YONGE NIGHT bus. The photographer is anonymous.