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GO Expansion Studies and FAQs

Read technical reports and frequently asked questions about GO Expansion.


Before a construction project can begin, Metrolinx undertakes various studies to help make decisions about the project. These studies include a business case, which presents evidence and analysis to explain why a project should be built, and an environmental assessment, which identifies potential impacts of a project and proposes ways to avoid, reduce or minimize them.

The following studies and reports were undertaken to support major work required across the entire GO rail network to implement the GO Expansion program.

Business Cases

GO Expansion

Read the GO Expansion business case.

Environmental Assessments

GO Electrification

Read the technical report for GO Electrification.

New Track & Facilities

Read technical reports about new GO track and facilities.

Scarborough Junction Grade Separation

Read technical reports about the Scarborough Junction Grade Separation.


Find out what we mean when we talk about some of our reports, studies and processes.

A business case is a report that is written to explain why a project should be built. It includes the benefits that a project would deliver, as well as potential risks. Metrolinx creates business cases for major projects to secure approval before moving on to detailed project studies, such as the Transit Project Assessment Process. Business cases provide evidence to decision-makers, stakeholders, and the public as a crucial part of transparent and evidence-based decision making processes.