The Ontario Ministry of Transportation (MTO) is improving the Highway 400 and Innisfil Beach Road interchange in the Town of Innisfil.

Road closures

There will be a series of road closures associated with this project. Follow the detour routes and signage, and allow for extra time to reach your destination. Travellers can visit 511 Ontario or the @511Ontario social media accounts for updates on local roadwork and its implications on traffic.

Closure - June 1 and 2, 2024

Innisfil Beach Road will be closed at Highway 400 for removal of the existing Highway 400 northbound bridge on June 1 to June 2, 2024. The planned timing of the closure is from 9:00 p.m. on June 1, 2024 to 10:00 a.m. on June 2, 2024. MTO's project contractor has outlined the following information:

  • Innisfil Beach Rd. eastbound and westbound under the Highway 400 will be fully closed from Industrial Park Road to 5th Sideroad
  • Access to the commercial and industrial blocks and residential blocks will fully accessible from Innisfil Beach Rd.
  • Innisfil Beach Rd. westbound to Highway 400 southbound on-ramp will be closed
  • Innisfil Beach Rd eastbound to Highway 400 northbound on-ramp will be closed
  • Highway 400 northbound to Innisfil Beach Rd westbound off-ramp will be closed
  • Highway 400 southbound to Innisfil Beach Rd. eastbound off-ramp will be closed

What will remain open:

  • Innisfil Beach Rd. westbound to Highway 400 northbound on-ramp will be open
  • Innisfil Beach Rd. eastbound to Highway 400 southbound on-ramp will be open
  • Highway 400 northbound to Innisfil Beach Rd. eastbound off-ramp will be open
  • Highway 400 southbound to Innisfil Beach Rd. westbound off-ramp will be open

If inclement weather or unforeseen delays impact the planned date, the alternate date will be June 7 to 8, 2024. 

Construction status 

MTO began construction on April 20, 2022. Construction is expected to continue until 2025. During this construction phase, motorists may experience temporary disruptions including: 

  • Construction traffic
  • Temporary traffic diversions
  • Noise
  • Dust

Disruption to services such as water, gas and electric are not expected.

Project overview

The project includes:

  • Replacement of the bridges on Highway 400 at Innisfil Beach Road and the Barrie-Collingwood Railway
  • Reconstruction of Innisfil Beach Road interchange
  • Reconstruction of the existing six-lane Highway 400 mainline to match the reconstructed interchange
  • Drainage improvements
  • Full illumination
  • Relocation of traffic signals to the new ramp terminals
  • Improvements to roadside safety


In 2004, the MTO undertook a Planning and Preliminary Design Study and Class Environmental Assessment to address transportation deficiencies along 30 km of Highway 400 from 1 km south of Highway 89 to the Junction at Highway 11. In 2017, a Class Environmental Study Update and Transportation Environmental Study Report addendum was completed that confirmed the 2004 approved plan for the Innisfil Beach Road interchange was still valid.

The Highway 400 bridge over Innisfil Beach Road requires replacement. The replacement structure will accommodate the future ultimate widened Highway 400. As part of the planned highway improvements, the nearby Barrie-Collingwood Railway bridge will also be replaced and Highway 400 – Innisfil Beach Road interchange ramps modified to match the new structure. These works were approved under the previously completed studies in 2004 & 2017 Addendum.

The MTO and project consultants issued a Notice of Completion and Design and Construction Report Submission in 2020.