May 7th, 2025
BURLINGTON, ON
The Project includes the 52-kilometre (km) Highway 413 corridor, a 4 km extension to Highway 410, and a 3 km extension to Highway 427 (both facilitating connection to the Highway 413 corridor), for a total of 59 km of new infrastructure.
The highway will have 11 interchanges at municipal roads. Features such as service centres, carpool lots, truck inspection stations, and the potential for electric vehicle charging stations, have been explored as part of Preliminary Design.
The transitway will be a separate corridor running alongside the highway, dedicated for public transit, which will be subject to a separate Environmental Assessment (EA).
Highway 413 would extend from Highway 400, between King Road and Kirby Road, to the 401/407 ETR interchange near Mississauga, Milton and Halton Hills.
In the Fall of 2024, MTO reached the 90% preliminary design milestone for the project. Along with reaching this milestone, the 2024 Draft Focused Analysis Area (FAA) for Highway 413 was updated to include targeted refinements, incorporating key design elements and environmental considerations. These adjustments were informed by updated preliminary design work and environmental studies, allowing for a better understanding of land use impacts and alignment with local infrastructure.
Similarly, the Ministry of Energy and Mines (MEM), formerly known as the Ministry of Energy and Electrification, advanced planning work on the Northwest GTA Transmission Corridor and proposed refinements to the Narrowed Area of Interest (NAI). The NAI is a corridor of land identified and protected by the ministry and Independent Electricity System Operator (IESO) for future linear electricity transmission infrastructure to support growth in the region. The FAA and NAI are almost identical. The land being protected by MEM is the same land being protected by the Ministry of Transportation (MTO), except where each is protecting additional lands specific to its particular use.
You can get lost in those acronyms.
As part of ongoing public consultation, the Draft FAA and NAI were posted on December 9, 2024, for a 30-day public review period on the Environmental Registry of Ontario. The consultation period was open for 30 days and concluded in January 2025. Public engagement is essential to our processes, ensuring that community perspectives help shape the final outcome.
MTO and MEM have recently finalized the FAA and the NAI at the current stage of each project, with no changes as a result of the public consultation. Each comment that was received through the ERO was reviewed and taken into consideration by both ministries.
Timeline and Next Steps
Highway 413 FAA
- An update on the FAA detailing its finalization has been posted to the Environmental Registry of Ontario, as well as the Highway 413 project website (https://highway413.ca/en/).
- MTO will be preparing a draft Environmental Impact Assessment Report (EIAR) in accordance with the requirements set out in the Highway 413 Act, 2024 anticipated in Fall 2025.
- The draft report will include a description of Highway 413 studies completed detailing environmental impacts, proposed mitigation measures and a record of consultation. The final report will be published to the Highway 413 project website.
- MTO will continue to review development applications in the study area, but it is anticipated that applications in the lands released will not be directly impacted by Highway 413.
Northwest GTA Transmission Corridor Study NAI
- An update to the NAI has been posted to the Environmental Registry of Ontario.
- MEM expects to undertake another round of consultation based on further refinements to the NAI that can be made as the Highway 413 project advances and as infrastructure planning is updated to reflect projected electricity demand growth in the region.
Environmental Registry of Ontario:
Indigenous Community and Stakeholder Engagement: As we gather input from municipalities, Indigenous Communities, and other key stakeholders, engagement sessions will continue. This ensures ongoing collaboration and transparency in the decision-making process. Additionally, MTO is currently in the process of planning individual landowner sessions to take place in early Spring with property owners directly impacted by the FAA.

It’s a wonder to me that any infrastructure ever gets built.