Need

"The University Subway was ahead of its time, in many ways - Conceived as a relief-line to the Yonge Subway, it did not start performing that function until the early 1980s, when congestion on the Yonge Subway started to get severe - Toronto’s downtown also started to grow to the west, and other developments as the Skydome and the new Theatre District on King Street have boosted ridership"

http://transit.toronto.on.ca/subway/5103.shtml