If you are heading out late at night this week you might have to find a different ride home. That's because starting tomorrow, the TTC is shutting down their main subway line, and it's happening almost every night this week. Specifically, this closure involves Line 1. 

Every night from Monday, March 4 to Thursday, March 7 Line one will be closed between St. Clair West and Union on the University side of the line. Typically service on this line runs until 1:30 or 2 AM every night. However, the closures will begin at 11 PM every night and will likely last until the regular service starts again which happens at 5:56 AM for southbound trains and at 6:18 for northbound trains each weekday. 

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During the closures, there will be shuttle buses running between St. Clair West and union and there will also be Wheel Trans services available for anyone with accessibility needs. 

The closures are inconvenient but they are for a pretty big reason. These nightly closures are allowing the TTC to install the brand new Automatic Train Controlling (ATC) signal system. Once the system is fully installed, the system is expected to be even more reliable and offer faster service. Unfortunately, that means more closures. 


In order to completely install the ATC on the entire line, the TTC will need to periodically shut down parts of Line 1. After this section is done, they are scheduled to move on to the stretch between Finch and Lawrence on the Yonge side. 

This will also involve nightly closures, which are due to take place between Monday, March 18 and Thursday, March 21. These closures will also start at 11 PM. 

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Then the closures will hit the downtown core. Starting on Monday, March 25 and lasting until Thursday, March 28, this will be the last of the scheduled closures for ATC installation. For this closure, Line 1 will be closed every night at 11 PM between Bloor-Yonge and St. Andrew stations. 

READ ALSO: TTC Responds To Bed Bug Sighting On The Subway In Toronto (PHOTO)

The TTC aims to do most of its subway maintenance or upgrades at night time or on the weekends when commuter demand is typically much lower.  

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