Questions & Answers

About the Project

Answer: The Project limits along Highway 401 extend from Steeles Avenue in Milton to 1.5 km west of the Halton-Wellington boundary (approximately 17 km), within the Town of Milton (Halton Region) and the Township of Puslinch (Wellington County).

The Study Area includes interchanges and roads and rail crossings over/under Highway 401 within the Project limits and the area required to complete environmental and engineering investigations for the Study.

Consultation and Engagement

Proponents can visit the Ministry of Transportations Corridor Management website to learn more about the land development review process and to initiate the application process for land development within the Ministry’s Permit Control Area here: https://www.ontario.ca/page/highway-corridor-management.

Permission to Enter

If you have received a Permission to Enter (PTE) letter, the Ministry is requesting to access your property to complete the required fieldwork and / or investigations necessary for the Project. The Ministry is requesting that the “Permission to Enter” form (included with your Permission to Enter Package) be signed by the Property Owner, to permit members of the Project Team to undertake the environmental field surveys and engineering investigations necessary to support the Preliminary Design Class EA Study. Fieldwork is a vital part of the study, and the data collected supports the Project with identifying existing environmental conditions and informs decisions on all aspects of the Project.  

The Ministry’s request to access your property does not mean your property is directly affected by the project or that it will be acquired. Direct property impacts will be determined during future phases of the Project once the alternative improvements to the highway have been assessed and a preferred approach to addressing existing and future transportation and operational needs has been identified.  

Access to your property may be required on one or more occasions throughout the Study, which is anticipated to be completed by December 21, 2026. The Ministry recognizes the sensitivity of this request for access and will work with Property Owners to schedule fieldwork and provide advance notice of the planned investigations via phone call or email. Please review the form, retain a copy for your files and return a signed copy back to the Project Team. If you have any questions about the proposed fieldwork or require assistance in completing the form, please contact us

Field Studies / Impact Assessment

Field and desktop investigations for disciplines such as geotechnical, natural sciences (fisheries and terrestrial), archaeology, cultural heritage, noise, contaminated property and waste management, groundwater, land use, landscape composition, erosion and sediment control, snow drift, air quality, drainage, etc. will be completed to collect background / existing conditions information.

These environmental investigations are ongoing. Following these investigations and completion of the recommended preliminary design plan, the Project team will determine potential environmental impacts and develop mitigation measures to avoid or minimize potential impacts as best as possible.

The results of these investigations and the proposed environmental mitigation and protection strategies will be documented in applicable study reports and summarized in the final TESR.