Highway 400 Improvements from 1 km South of Highway 89 to the Junction at Highway 11
Transportation Environmental Study Report Addendum

A Transportation Environmental Study Report (TESR) Addendum has been prepared to document changes to the recommended plan for improvements to Highway 400 from 1 km south of Highway 89 to the Junction of Highway 11 outlined in the 2004 TESR. The TESR Addendum includes a discussion on the need for the changes to the 2004 TESR, the generation, assessment and evaluation of alternatives, the recommended plan, a summary of environmental issues and potential mitigation measures, a summary of consultation undertaken, and commitments to be carried out during future design and construction. The TESR Addendum is available for a 30-day review period commencing Thursday November 9, 2017 and ending Friday December 8, 2017 at the locations listed on the Notice of TESR Addendum Submission.

Click on the links below to view the TESR Addendum and related appendices:

The TESR Addendum can also be viewed at the following locations during regular business hours between November 9, 2017 and December 8, 2017:



Interested persons are encouraged to review the TESR Addendum and provide written comments to the Ministry of Transportation and AECOM during the 30-day review period (ending Friday December 8, 2017). If after consulting with the Ministry and consultant staff, you still have serious unresolved concerns, you have the right to request the Minister of the Environment and Climate Change (in writing to: Ferguson Block, 11th Floor, 77 Wellesley Street West, Toronto, Ontario M7A 2T5) to issue a Part II Order (i.e. bump-up) for this project. A Part II Order may lead to the preparation of an Individual EA. A copy of the Part II Order request that is sent directly to the Minister of the Environment and Climate Change should also be forwarded to the Ministry of Transportation and consultant staff at the addresses listed here Only changes described in the TESR Addendum are eligible for Part II Orders. If there are no outstanding concerns at the end of the 30-day review period (ending Friday December 8, 2017) the project will be considered to have met the requirements of the Class EA. In the event that a Part II Order request is granted, MTO has the option to withdraw the Addendum.

There is an opportunity at any time during the study for interested persons to provide input to the Project Team regarding the study. Comments are being collected to assist MTO in meeting the requirements of the Ontario EA Act. This material will be maintained on file for use during the study and may be included in project documentation. Information collected will be used in accordance with the Freedom of Information and Protection of Privacy Act. With the exception of personal information, all comments will become part of the public record. If you have any accessibility requirements in order to participate in this project, please contact one of the Project Team members listed here.

Highway 400 / Highway 89 Interchange – Interim Improvements
Transportation Environmental Study Report Addendum

A Transportation Environmental Study Report (TESR) Addendum was prepared to document changes to the Highway 400 / Highway 89 Interchange recommended plan outlined in the TESR (2004). The TESR Addendum includes a discussion on the need for improvements at the Highway 400 / Highway 89 Interchange, the generation, assessment and evaluation of alternatives, the recommended plan, a summary of environmental issues and potential mitigation measures, a summary of consultation undertaken throughout the study, and commitments to be carried out during Detail Design and construction. The TESR Addendum was available for a 30-day public and agency review period from Thursday March 23, 2017 to Friday April 21, 2017.

Click here to view the Transportation Environmental Study Report Addendum.

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