Provincial study recommends new arterial to ease future congestion
The Ontario Ministry of Transportation has engaged Stantec Consulting Ltd. to undertake a Planning, Preliminary Design and Class Environmental Assessment for Highway 3, a study that proposes a new corridor to improve links between St. Thomas and communities to the east, including Aylmer.
The study, presented this week to Elgin County council, examines projected traffic conditions driven by population and employment growth in the area. Its findings warn that the existing Highway 3 alignment will be over capacity by 2051, and that several key intersections will not adequately serve future traffic volumes.
Key pressures and pinch points identified
Stantec highlighted several pressure points that would affect motorists travelling to and from St. Thomas:
- Highway 3 is forecast to be over capacity by 2051.
- The Centennial Road/Highway 3 intersection will be over capacity in both morning and afternoon peak periods.
- Signalized intersections in Aylmer are expected to be over capacity during peak periods.
- Traffic signals will likely be required to provide gaps for sideroad traffic to enter or cross Highway 3 at locations such as Yarmouth Centre Road and Springwater Road.
- Absent improvements, through traffic on Highway 3 is expected to shift onto other municipal roads.
| Issue | Projected outcome |
|---|---|
| Highway 3 capacity | Over capacity by 2051 |
| Centennial Rd/Highway 3 | Over capacity in AM and PM peaks |
| Aylmer signalized intersections | Over capacity during peak periods |
Proposed corridor and local links
The study includes concept routing that would place a new corridor north of the existing Highway 3. A main alignment is shown on maps in blue, with five alternative bypass routes shown in yellow — some of which would skirt the Town of Aylmer. The proposed new arterial would tie into the St. Thomas Expressway extension, locally known as the Technology Trail, and improve direct connections to employment lands such as Yarmouth Yards.
Stantec's presentation framed the corridor as a way to manage growth-related traffic and to reduce the tendency for provincial traffic to reroute onto local municipal roads.
Public engagement and next steps
The first of three public information sessions is scheduled for Aug. 26, from 4 to 7 p.m. at the East Elgin Community Complex — Blueline Room, 531 Talbot Street West in Aylmer. The study will continue to refine the alternatives through design and environmental assessment phases, with further details to be shared at subsequent sessions.
For St. Thomas residents, the study signals early planning for growth pressures that could affect commute times, freight movement and local road congestion over the coming decades. The proposed corridor would shift some long-distance traffic away from municipal roads, but will also require land use, environmental and community considerations as the project progresses through the Class EA process.
Municipal officials and residents who use Highway 3 are likely to follow the study closely; any eventual alignment could change travel patterns and development opportunities for parts of Elgin County and the St. Thomas area. The public session in Aylmer offers the first formal opportunity to review maps and provide comment to the project team.
Anyone seeking more information or wanting to review materials should consult the project contacts provided by the Ministry of Transportation and Stantec ahead of the Aug. 26 meeting.
