Bradford Bypass Project

The Ontario Ministry of Transportation is proposing the construction, operation and maintenance of the Bradford Bypass - a new 16.2-kilometre four-lane controlled access highway. This proposed project, also known as the Highway 400-404 Connecting Link, the Highway 400-404 Extension Link or the Holland Marsh Highway, would connect Highway 400 in Bradford West Gwillimbury (Simcoe County) to Highway 404 in East Gwillimbury (Regional Municipality of York) and cross north King Township. The corridor would require a new 100-metre wide right-of-way, and would cross over the Holland River and Holland River East Branch within the Holland Marsh. The Project would also include the replacement of the 9th Line structure on Highway 400.

Latest update

May 3, 2021 — The Minister of Environment and Climate Change has determined that the Bradford Bypass Project proposed by the Ontario Ministry of Transportation does not warrant designation under the Impact Assessment Act. The reasons for the Minister’s determination are provided in his response.


Key documents

Key documents
Document Number Document Title File Date
20 Minister's Response - May 3, 2021
1 Request for Designation of Project PDF (626 KB) February 3, 2021


Ontario Region
Impact Assessment Agency of Canada
600-55 York Street
Toronto, Ontario M5J 1R7

  • Location

    • East Limits at Highway 404 (Ontario)
    • West Limits at Highway 400 (Ontario)
  • Nature of Activity

    • Highways and Roads
  • Assessment Status

  • Proponent

    Ontario Ministry of Transportation
  • Authorities

    • Impact Assessment Agency of Canada
  • Assessment Type

    Assessment not applicable
  • Reference Number


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.


Nearby assessments

...within 200 kilometres
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