MTO informed OTA of a Notice of Road Closure and Night Work to support the demolition of the existing Tremaine Road bridge. All lanes of Highway 401 will be closed from Regional Road 25 to Guelph Line from 9 pm, Saturday, July 12, 2025 to 9 am, Sunday, July 13, 2025, weather permitting.
If there are unforeseen delays, the contingency dates for the bridge demolition and Highway 401 full closure are from 9 pm, Saturday, July 19 to 9 am, Sunday, July 20.
The detour route will take traffic north of Highway 401 to Campbellville Road between Regional Road 25 and Guelph Line and it will be well marked, traffic lights will be on flash mode and Halton Police will be on site to assist with traffic control. The detour map is included in the attached notice.
The MTO has advised us they will update 511on.ca with the closure and detour information.
Any updates or changes will be communicated on “What you need to know about the Tremaine Road Improvements Project”.
See below for more info: