The provincial Ministry of Transportation has started an environmental assessment on a new Highway 3 alignment between St Thomas and Aylmer.
From the article below:
The purpose of the study is to identify transportation improvements to Highway 3, including a new arterial road connecting to the St. Thomas Expressway extension, known as Technology Trail, to improve transportation connections between St. Thomas, including Yarmouth Yards, and communities to the east.
Looking at future operating conditions on Highway. 3, with additional population and employment growth in the study area:
• Highway 3 will be over capacity by 2051
• Centennial Road/Highway 3 intersection will be over capacity in both the morning and afternoon peak periods
• Traffic signals will be required to provide gaps for sideroad traffic to enter or cross Highway 3 (Yarmouth Centre Road and Springwater Road)
• Signalized intersections in Aylmer will be over capacity during peak periods
• Highway 3 traffic will likely shift to other municipal roads
A new corridor (shown in blue on the map) would be routed north of the existing Hwy. 3, with five alternate routes (show in yellow) bypassing the Town of Aylmer.
https://www.stthomastoday.ca/2026/08/12/99024/
https://www.highway3elgineast.ca/documentation.html