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The Ontario Ministry of Transportation (MTO) is undertaking planning and design activities to support the future widening and improvement of approximately 118 km of Highway 401 between Tilbury and London.

Stantec Consulting Limited was retained by MTO to complete the Preliminary Design, initiate Detail Design and Class Environmental Assessment (EA) Study to address the future needs of the Highway 401 corridor from Tilbury to London within the Municipality of Chatham-Kent, Elgin County, Middlesex County, and City of London. The study will consider pavement and bridge improvements, corridor management, highway safety, traffic operations, environmental impacts, drainage, and maintenance operations.

Project Details

  • NEW: Elgin County/Middlesex County/City of London (Highway 401 at Southminster Bourne)
    • New interchange ramps at Highway 401 and Southminster Bourne
    • Preliminary Design, Class EA and Design Build Ready Study – Group B under the 2024 Class EA (WP 3044-26-01).
  • Municipality of Chatham-Kent (C-K) (Merlin Road to C-K/Elgin County Boundary)
    • Widening/reconstruction of approximately 55 km of Highway 401 (addition of one lane in the median in each direction) and construction of a concrete median barrier TESR Review and initiate Detail Design Group B Class EA 2000 (GWP 3024-18-00).
    • Interchange and underpass improvements TESR Review and initiate Detail Design Group B Class EA 2000 (GWP 3078-18-00).
  • Elgin County (C-K/Elgin County Boundary to Union Road)
    • Widening/reconstruction of approximately 39 km of Highway 401 (addition of one lane in the median in each direction) and construction of a concrete median barrier Preliminary Design and Initiate Detail Design Group C Class EA 2000 (GWP 3073-17-00).
    • Interchange and underpass improvements Preliminary Design and initiate Detail Design Group B Class EA 2000 (GWP 3079-18-00).
  • Elgin/Middlesex Counties (Union Road to Highway 4 (Col. Talbot Road))
    • Widening/reconstruction of approximately 14 km of Highway 401 (addition of one lane in the median in each direction) and construction of a concrete median barrier Preliminary Design and initiate Detail Design Group C Class EA 2000 (GWP 3038-19-00).
    • Interchange and underpass improvements Preliminary Design and initiate Detail Design Group B Class EA 2000 (GWP 3079-18-00).
  • Middlesex County/City of London (Highway 4 (Col. Talbot Road) and Wellington Road)
    • Widening/reconstruction of approximately 10 km of Highway 401 (addition of one lane on the outside in each direction) and underpass improvements TESR Review and initiate Detail Design Group B Class EA 2000 (GWP 3025-18-00).
    • The design of the Highway 401/Highway 4 (Col. Talbot Road) Interchange improvements, including the replacement of the Glanworth Drive Underpass, is being undertaken as a separate project by Dillon Consulting Limited.
  • Review of requirement and location for a new patrol yard within the Highway 401 corridor between Tilbury and London

Construction Sequence and Schedule

Construction timing will be subject to funding and approvals.