The TTC is closing part of the University-Spadina line and Bloor-Yonge line this weekend.
All trains on the University-Spadina line will turn back north at St Andrew Station and trains along the Yonge line will turn around at Bloor-Yonge Station.
The TTC says there will be shuttle bus service between Bloor-Yonge and St. Andrew stations.
Customers may use the 6 Bay or 94 Wellesley buses as well as the 506 Carlton, 505 Dundas, 501 Queen or 504 King streetcars as an alternative.