Bloor–Danforth line
The platform was in service from February to September 1966 as part of an interlining experiment, in which the TTC ran trains along three routes, with one matching the subsequent Bloor–Danforth line, and the other two combining parts of the Bloor–Danforth line with the Yonge–University line. The experiment was deemed a failure, largely because delays anywhere quickly cascaded to affect the entire system. Also, as the stations had not been laid out effectively for cross-platform interchange, trains travelling east from and west from Yonge alternated between the two levels, leading passengers to wait on the stairs in-between the levels, since they were unable to tell which platform would receive the next train.