There is no subway service on Line 1 between St. George and Union stations on Saturday.
According to the TTC, the closure is to give them time to allow work to be done on the tracks and also give them a chance to perform much needed maintenance on the Yonge-University line.
Shuttle buses are being made available for commuters affected by the closure.
Regular service will resume on Sunday at 8 a.m.
For more information click Saturday Subway Closure.