Overview
The Bradford Bypass (also known as Highway 425) West Project includes the West portion of the new Bradford Bypass corridor from Highway 400 to west of Artesian Industrial Parkway. The West Section of the Bradford Bypass will include a four-lane rural divided freeway, two interchanges (10th Sideroad and County Road 4), Highway 400/Line 9 Bridge Replacement, and a freeway-to-freeway interchange (Highway 400/Bradford Bypass).
AECOM Canada Ltd. (AECOM) recently completed an Environmental and Detail Design Study for the West Section of Bradford Bypass.
As the Environmental and Detail Design Study for the West Section of Bradford Bypass is now complete, construction of the West Section has begun. Brennan Paving & Construction Ltd., a subsidiary of the Miller Group, has been retained by MTO as the contractor for the West Section. Construction administration services will be provided by the Program Management Consultant team, Jacobs Consultancy Canada Inc. & Egis Canada Ltd.
Further updates will be posted here.
Updates & Notices
May 2026 Update - West Construction Start
The Miller Group has been awarded the contract to construct the West Section of the Bradford Bypass (also known as Highway 425). Work has begun at Sideroad 10 to build the divided highway from west of Artesian Industrial Parkway to Highway 400.
April 2026 Update - Non-Significant Addendum to the Final Environmental Impact Assessment Report
In accordance with Section 29 of the Ontario Regulation 697/21: Bradford Bypass Project, should any project changes be required during the Detail Design phase that are inconsistent with the Final Environmental Impact Assessment Report, an addendum shall be prepared. As such, a Non-Significant Addendum Report has been prepared to document project changes for the Bradford Bypass West Project:
Winter 2026 Update - Implementation of the West Section
In Fall 2024 design work included development of an initial vegetation removals implementation contract. This work was carried out in late Fall 2024 with environmental protection measures, including erosion and sediment control measures used to protect the environment.
The next phase of implementation included the construction of a 10th Sideroad (County Road 54) temporary detour on the west side of 10th Sideroad. Environmental protection measures, temporary lighting, and installation of protection measures for the existing Town of Bradford West Gwillimbury watermain is ongoing. The purpose of constructing this detour is to avoid impacts to local traffic using 10th Sideroad during construction of the new 10th Sideroad bridge to be built as part of the Bradford Bypass West Project.
Detail design of the Bradford Bypass West Project is ongoing and will include a comprehensive Landscape Design for the West section of the Project. The Landscape Design will include mitigation and restoration measures such as noise walls (where applicable and feasible), and areas where reforestation, edge management, compensation plantings and snow drift measures are anticipated to be implemented.
Construction of the remaining components of the Project are anticipated to begin in 2026. A Project Update is available here with further information on design progress and future phases of work, including when landscape restoration and mitigation measures will be implemented.
If you have any questions related to the Project or the work to take place during the next phase of implementation, please Contact Us.