Highway 138 Improvements
from Highway 401 to Highway 417
(GWP 4015-08-00)
Detailed Design, and Class Environmental Assessment Study, Ontario Ministry of Transportation
The Ontario Ministry of Transportation (MTO) has retained Parsons Inc. (‘Parsons’) to undertake the Detailed Design, and Class Environmental Assessment (EA) Study (the Project) for improvements on Highway 138. The Study Area is located between Highway 401 and Highway 417.
This website is intended to keep stakeholders and members of the public updated on the Project. This website will be continually updated to provide notification of project milestones, opportunities for public engagement and other relevant information, such as publicly available reports and other materials. The Project Team would be glad to address any comments, concerns or inquiries you may have regarding the Project.
Contact Us
Please visit the contact page to get in touch with key project staff, to submit a comment, or to be added to the project mailing list.
Accessibility Requirements
If you have any accessibility requirements in order to participate in this Project, please contact the Project Team through the contact page.
Latest Updates
July 7, 2026
Notice of Commencement
This Project is following the approved planning process for a Group ‘B’ project under the MTO Class Environmental Assessment (Class EA) for Provincial Transportation Facilities (2000). Consultation will be ongoing throughout the project.