Caption: TTC PCC 4644 (an A11-class car originally built by Pullman in 1946 for Cleveland) operates in MU with a sister car on the busy Bloor route, heading westbound in evening traffic crossing the Bloor Viaduct (otherwise known as the Prince Edward Viaduct) near Castle Frank Road. Some of the TTC's PCC fleet (notably the 4400- and 4600-series cars) were outfitted with Multiple Unit couplers at either end for use as two-car trains on busy routes such as Bloor, Danforth, and Queen. Other cars had metal bumper strips installed in the opening where the coupler would go (and later, conventional water bumpers).

The exact date of this shot is unknown, but going by the processing stamp of March 1966, this was likely taken around the end of the Bloor-Danforth streetcar service sometime in February 1966. The new subway line opened on February 26th and eliminated most of the busy Bloor and Danforth streetcar route (including this section crossing the viaduct), except for short "shuttle" runs at both ends of the line that were operated until further extensions opened in May 1968. Ironically enough, the Bloor Viaduct had been built in the 1910's with the forsight of a lower deck under the roadway for any future rapid transit lines, so the rails over the Bloor Viaduct were effectively replaced by rails under the roadway when the B-D line was built 50 years later in the early-mid 1960's.

Original photographer unknown, Dan Dell'Unto collection slide.