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City of Cornwall Council Presentation

This preliminary design and environmental assessment study focuses on the rehabilitation or reconstruction of the aging twin Highway 401 Cornwall Centre Road overpass bridges in Cornwall. Alternative solutions are evaluated, with Alternative 1A' emerging as the preferred plan, featuring rigid frame bridges and traffic management strategies. Temporary road closures and detour routes are planned, with provisions for pedestrians and cyclists. The next steps include reviewing public feedback, finalizing the Recommended Plan, and presenting recommendations to local authorities for further action.

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City of Cornwall Council Presentation

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  1. Highway 401 Cornwall Centre Road Overpass Bridges Preliminary Design and Environmental Assessment Study City of Cornwall Council Presentation

  2. Study Area N

  3. Problem • The twin Highway 401 Cornwall Centre Road overpass bridges were constructed in the early 1960’s. • These bridges have service lives of 50 - 70 years. • The bridges have reached the end of their service life and will need to be rehabilitated or reconstructed. • Temporary measures have been implemented by MTO as a safety precaution.

  4. Alternative Planning Solutions Carried Forward Not Carried Forward

  5. Factor Weights Sub Factor Weights Global Factor Weights

  6. Results of the Weighting Exercise Technically Preferred Alternative

  7. Technically Preferred Plan Alternative 1A’: Two open-footing concrete rigid frame bridges and retaining walls; 2 lanes of traffic in each direction maintained on Highway 401; north side detour within MTO right-of-way using retaining walls; Cornwall Centre Road closed during construction. RETAINING WALL RETAINING WALL

  8. Traffic Recommendations for Staging of Preferred Alternative Temporary Ramp Closure/ Redirect movements to adjacent ramp Add southbound left turn lane Add temporary traffic signals • Highway 401 Work Zone • 2 Lanes/Direction • 80 km/h Temporary Road Closures (2)

  9. Traffic Recommendations for Staging of Preferred Alternative – Detour Route • All roads assigned to detour route are designated as arterial roads in the City of Cornwall Official Plan. • Temporary closure of Cornwall Centre Road for two years. Preliminary Detour Route

  10. Recommended Plan • The study team recommends Alternative 1A’ as the preferred alternative. • The plan includes: • Two open-footing rigid frame bridges to carry Highway 401 traffic over Cornwall Centre Road; • 2-stage construction maintaining 2 lanes of Highway 401 traffic in each direction; • Highway 401 detour through the construction zone constructed north of existing alignment within MTO right-of-way; • New bridge includes provisions for pedestrians and cyclists on Cornwall Centre Road; • Temporary closure of the north to west Highway 401 on-ramp. • Temporary signals at the Brookdale Avenue interchange north ramp terminal and a left turn lane; and • Temporary closure of Cornwall Centre Road for two years.

  11. Next Steps • Following this meeting we will: • Review all comments from the public and agencies; • Consider comments received; • Conduct briefing meetings with affected external agencies, interest groups and property owners; • Prepare a Recommended Plan; • Present recommendations to Township of South Stormont and City of Cornwall; and • Upon completion of the study, a Transportation Environmental Study Report will be available for a 30 -day public review and comment. Notices will be published at that time.

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