Metrolinx is building a convenient and integrated transit network which includes electrification. Electrifying GO rail corridors is a multi-year project and we are committed to working with residents across the Greater Toronto and Hamilton Area throughout the process.

The first step to electrify GO-owned portions of the network is to move forward with the Transit Project Assessment Process (TPAP). The TPAP will build on previous environmental assessments and public engagement including the 2010 GO Transit Electrification Study, the TPAP for the Union Pearson Express, and the Class Environmental Assessment for Minor Transmission Facilities conducted by Hydro One.

2011-2014: Union Pearson Express Environmental Assessment

Electrification of the rail corridor is a large-scale projects for which Metrolinx completed a Transit Project Assessment Process (TPAP) for the Union Pearson (UP) Express (completed in December 2014), and a Class Environmental Assessment (EA) for Minor Transmission conducted by Hydro One (completed February 2015).

Environmental Project Report

On April 1, 2014, Metrolinx issued a Notice of Completion for the UP Express Electrification Environmental Project Report (EPR). The EPR was made available for a 30-day public review and comment period. Following this review period, all submitted comments were reviewed by the Ministry of the Environment (MOE) as part of their 35-day review. The Minister of the Environment did not issue a notice under subsection 12(1) of the Transit Regulation within the time period set out in the regulation. Therefore, Metrolinx submitted a Statement of Completion to the MOE to complete the Transit Project Assessment Process.

On February 13, 2015, the Minister of the Environment and Climate Change advised that after review of the Part II Order request received on the UP Express Traction Power Substation Class EA (by Hydro One), an Individual Environmental Assessment is not required. As a result, the TPAP and Class EA processes were deemed complete.

To view the Environmental Project Report, please click the links below:

Executive Summary
EPR Table of Contents and Glossary
EPR Chapter 1 – Introduction
EPR Chapter 2 – Assessment of Facility Locations
EPR Chapter 3 – Scope of the Project
EPR Chapter 4 – Baseline Conditions
EPR Chapter 5 – Detailed Project Description
EPR Chapter 6 – Impact Assessment & Monitoring
EPR Chapter 7 – Commitments & Future Work
EPR Chapter 8 – Consultation
EPR Chapter 9 – Approvals and Permits

EPR Appendices
Appendix A - Natural Environment Assessment Report
Appendix B - Land Use Assessment Report
Appendix C - Cultural Heritage Assessment Report
Appendix D - Stage 1 Archaeological Assessment Report
Appendix E - Air Quality Assessment Report
Appendix F - Noise and Vibration Assessment Report
Appendix G - Visual Impact Assessment Report
Appendix H - Electromagnetic Compatibility (EMC) Report
Appendix I - Traffic Report
Appendix J - Consultation Record
Appendix K - Utilities Report
Appendix L - Maintenance Facility Conceptual Design Report

2009-2011: GO Transit Electrification Study

On May 26, 2009, Metrolinx announced that it would be undertaking a one-year study on the feasibility of electrification of the entire GO rail system. In comparison to other similar studies, this study was unique as it examined the entire GO rail system. It was comprehensive in its approach and addressed the impact of different technologies at a high level of detail. The Study considered the economic, social, environmental, health, and technological factors for current and future diesel and electric technologies. The study was completed in December 2010.

On January 19, 2011, Metrolinx released the findings of its comprehensive study on the electrification of the entire GO Transit rail system and the future UP Express, as a future alternative to Tier-4 diesel trains.

After a careful review of the findings, the staff recommended to the Metrolinx Board of Directors to proceed with the electrification of the GO Kitchener and Lakeshore corridors in phases, beginning with the UP Express on the Kitchener corridor. At its Board meeting on January 26, 2011, the Metrolinx Board of Directors approved the staff recommendation, subject to provincial funding. The Province of Ontario, through the Ministry of Transportation, has funded the environmental assessment for Phase 1: the Air Rail Link from Union Station to Pearson Airport as a first step toward electrification.

Download the E-Study Final Report

E-Study Final Report Appendices:

1 High Level Decision Making Framework 8D Air Quality & Health Impacts
2 Stakeholder Engagement and Communications 8E Noise & Vibration Impacts
3 Baseline/Reference Case 8F Natural Environmental Impacts
4 Rolling Stock Technology Assessment 8G Social/Community Impacts
5 Operating Plan for the Reference Case 8H Economic Impacts
6 Electrification Systems Technology Assessment 8I Population and Community Use Analysis
7 Conceptual Design of Electrification System 8J Risk Assessment
8A Approach to Cost Benefit Analysis 9 Multiple Category Evaluation - Findings and Conclusions
8B Incremental Capital Cost Estimates 10 Implementation of Electrification Options
8C Incremental Operations and Maintenance Cost Estimates  

If you are interested in previously-posted reference documents and can no longer located them on the Electrification microsite, please contact us to obtain a copy at