Dundas Street Improvements
About this project
Improvements will address future traffic demands and provide safe travel options for motorists, pedestrians and cyclists and include:
- Widening from four to six lanes
- Road resurfacing
- New multi-use paths and sidewalks
- New bus stops and shelters
- Upgraded stormwater management infrastructure
- New traffic signals and street lights
- New on-road bike lanes
- Environmental protection measures
- New bridges
Equipment for the Regional Advanced Traffic Management System (ATMS) will also be installed. The ATMS is a traffic signal control system that enables real-time signal adjustments to save time, reduce emissions and improve safety for motorists.
Project details
Improvements phases
Phase 1
Phase 2
Phase 3
Project renderings
Explore the images below for what you can expect to see once improvements are complete.
Cross section
Phase 1 (Appleby Line to Bronte Road)
Improvements include:
- road widening
- new bike lanes
- new multi-use paths with barriers
Improvements include:
- road widening
- new bike lanes
- new multi-use paths
Improvements include:
- road widening
- new bike lanes
- new multi-use paths
- new bus shelter
Improvements include:
- road widening
- new bike lanes
- new multi-use paths
Improvements include:
- road widening
- new lookout points
- new multi-use paths with barriers
- new bike lanes
Project map
Project Timeline
Phase 1 Timeline
Environmental Assessment completed.
Detailed design completed for Phase 1.
Construction start for Phase 1.
Anticipated project completion for Phase 1.
Phase 2 Timeline
Detailed design anticipated to be completed for Phase 2.
Phase 3 Timeline
Detailed design anticipated to be completed for Phase 2.
What you can expect day-to-day
Dundas Street is a major east-west corridor that many residents and motorists rely on to get to work, school, home and retail every day. Halton Region is making every effort to minimize the disruptions and help you plan ahead for construction activity the extension will create.
Learn more about what to expect day-to-day, our mitigation plans and how to stay connected on the project.
I'm a resident or business in the area
I use this road regularly
Bronte Creek restoration
Latest traffic updates and notices
Traffic updates
Appleby Line to Tremaine Road
Night work between Appleby Line and Tremaine Road will begin on Monday, November 17, 2025, and be completed by Saturday morning, November 29, 2025.
This work is weather dependent, and any unforeseen changes will be communicated in advance through this webpage.
Tremaine Road to Bronte Road
Update: Night work and lane restrictions from Tremaine Road to Zenon Drive/Colonel William Parkway will occur from Sunday evenings to Friday mornings, 7 p.m. to 6 a.m., from November 9 to December 5, 2025.
During this time, traffic may be reduced to one lane for both directions with traffic control flagging as required.
This work is weather dependent, and any unforeseen changes will be communicated in advance through electronic road signs and this webpage. Motorists and transit users should expect significant delays when travelling through the area and are encouraged to find alternate routes.
Latest notices
- November 14, 2025: Notice of Night Work, Appleby Line to Tremaine Road (PR-2672B) (external link)
- November 7, 2025: Notice of Night Work & Lane Restrictions, Tremaine Road to Bronte Road (PR-2671B) (external link)
- August 20, 2024: Notice of Construction, Tremaine Road to Bronte Road (PR-2671B) (external link)
- June 7, 2021: Notice of Construction, Appley Line to Tremaine Road (PR-2672B) (external link)