Late nights Monday, March 29 until Thursday, April 1, Line 1 Yonge - University subway trains in both directions operate along the northbound tracks only between Vaughan Metropolitan and Pioneer Village stations, while TTC crews repair a leak on the southbound tracks. Regular service resumes by 6 a.m. each morning.

(Since the single-track operation occurs after midnight each night, technically, the closure is from Tuesday, March 30 until Good Friday, Friday, April 2.)

During single-track operation, both south- and northbound trains alternate along the northbound tracks.

Passengers must board southbound trains on the northbound platforms at Vaughan Metropolitan Centre, Highway 407 and Pioneer Village stations. You may also have to wait for trains longer than usually.