The Ontario Ministry of Transportation (MTO) has retained Stantec Consulting Limited (Stantec) to complete the Preliminary Design, Detail Design, and Class Environmental Assessment (EA) Study to address the future needs of the Highway 3 corridor from Highway 4 near the village of Talbotville in the Municipality of Southwold to Centennial Road in the City of St. Thomas.

The study has been divided into two group work projects (GWPs), which include the following scope of work:

  • Highway 3 Twinning (City of St. Thomas, Municipality of Central Elgin, and Township of Southwold)
    • Construction of two additional lanes (i.e., twinning) along Highway 3 from Ron McNeil Line to Centennial Avenue (approximately 9.4 km)
    • Preliminary Design, Detail Design, and Group ‘B’ Class EA (GWP 3041-22-00)
  • Talbotville Bypass (Township of Southwold)
    • Construction of a new Talbotville Bypass from Highway 4 to Highway 3 at Ron McNeil Line
    • Widening of Highway 4 from two (2) to four (4) lanes from Clinton Line to the new Talbotville Bypass (approximately 2.4 km)
    • Preliminary Design, Detail Design, and Group ‘A’ Class EA (GWP 3042-22-00)

The study will consider the overall construction sequence for the proposed improvements. Construction will follow the environmental assessment and design phase. Specific timing for the various components of construction will be confirmed as the study progresses and will be provided on the project website when the information becomes available.


A list of study updates will be included here with dates and links to relevant documents (i.e., Notice of Study Commencement, PICs, Notice of Completion, etc.).

Notice of Proposed Transition - Highway 3 Elgin May 29 2024

Notice of Study Commencement - Highway 3 Elgin June 1 2023

Notice of Public Information Centre 1 and Study Design Report Review Period

Notice of Public Information Centre 2

Notice of Study Completion - Highway 3 Elgin January 31 2024