City of CornwallCouncil Presentation

Highway 401 Cornwall Centre Road Overpass Bridges Preliminary Design and

Environmental Assessment Study

Study Area

N

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.

Alternative Planning Solutions

Not Carried ForwardCarried Forward

Factor Weights

Global Factor Weights Sub Factor Weights

Results of the Weighting ExerciseTechnically

Preferred Alternative

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

Traffic Recommendations for Staging of Preferred Alternative

Temporary Ramp Closure/ Redirect movements to

adjacent ramp

Temporary Ramp Closure/ Redirect movements to

adjacent ramp

Temporary Road Closures (2)

Temporary Road Closures (2)

Highway 401 Work Zone•2 Lanes/Direction •80 km/h

Highway 401 Work Zone•2 Lanes/Direction •80 km/h

Add temporary traffic signals

Add temporary traffic signals

Add southbound left turn lane

Add southbound left turn lane

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

Preliminary Detour Route

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.

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.