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Highway 401 and Waterloo Regional Road 97
(Cedar Creek Road) Underpass Replacement and Interchange Improvements
Highway 401 and Waterloo Regional Road 97
(Cedar Creek Road) Underpass Replacement and Interchange Improvements
The Ontario Ministry of Transportation (MTO)
The Ontario Ministry of Transportation (MTO)
Preliminary Design and Class Environmental Assessment GWP 3055-11-00
Preliminary Design and Class Environmental Assessment GWP 3055-11-00
Project Update - February 2026
Project Update - February 2026
Thank you to those individuals and groups that provided comments on the Transportation Environmental Study Report for the Preliminary Design and Class Environmental Assessment Study for Highway 401 and Waterloo Regional Road 97 (Cedar Creek Road) Underpass Replacement and Interchange Improvements.
The public review period has now closed and the Project Team is in the process of reviewing and responding to the feedback we received.
The TESR remains available for review on the Reports page of this website.
Project Background
Project Background
Constructed in 1960, the Cedar Creek Road Underpass is located in the Regional Municipality of Waterloo. The underpass carries two lanes of local traffic over Highway 401, approximately 5 kilometres northeast of the community of Ayr.
The Ministry of Transportation, Ontario (MTO) has identified the underpass structure for replacement to address current operational needs and to accommodate the future widening of Highway 401.
The current study will build and expand upon the past preliminary design work completed in 2018.
Project Location
Project Location
The MTO has retained Dillon Consulting Limited to conduct a Preliminary Design and Class Environmental Assessment (EA) Study for underpass replacement and interchange improvements to Waterloo Regional Road 97 (Cedar Creek Road) and Highway 401, located in the Regional Municipality of Waterloo.
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