Another switch to exclusive GO bus service begins late this evening, July 26.
GO buses will stop at Old Elm, Stouffville, Mount Joy, Markham, Centennial, and Unionville GO stations, then run express to the Union Station Bus Terminal.
Stouffville riders should utilize the 71C bus, as the 71E will not be serving Old Elm and Stouffville GO stations.
Customers travelling to and from Milliken, Agincourt, and Kennedy GO stations are encouraged to use the TTC, Metrolinx says.
The rail service pause will facilitate track construction and maintenance, including work to add a second track between Agincourt and Kennedy GO.
Riders are advised to check triplinx.ca to best plan their weekend travel.
Regular rail service will resume on Monday morning.