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What we’re building

For years, Metrolinx has steadily increased GO Transit service with the goal of transforming from a rush hour commuter service to a two-way, all-day regional transportation service. Regional Express Rail (RER) will build on all the planning and infrastructure progress we have already made and fast-track future service expansion.

Building forward-looking infrastructure

Metrolinx has over 200 projects worth over $16 billion already underway—including significant work to update GO Transit infrastructure that is foundational Regional Express Rail (RER) service.

Track Work

In August 2015, work began on building a second track on a five-kilometre section of the Stouffville corridor from Kennedy Road to Marilyn Avenue. This is the first part of a multi-year project that will expand and improve 17 kilometres of corridor from Scarborough Junction to Unionville GO Station. Once complete, this expansion will enable more train trips and the eventual introduction RER service.

In early 2015, work began to add a second track on a six-kilometre section of track from north of York University GO Station to Rutherford GO Station. Work to add a second track to the remainder of this corridor is in the planning and design phase. Read the news release.

Network Signals, Communications and Maintenance Facilities

The East Rail Maintenance Facility will be a 500,000 square foot facility located in Whitby that will provide mechanical maintenance, body repair, as well as day-to-day cleaning and operational services – all essential in order to provide backend support for regional rail expansion. Infrastructure Ontario selected a proponent to design, build, finance and maintain the facility. Construction is underway and is expected to be complete in late 2017.


Sixty-four GO Rail stations currently serve thousands of customers daily throughout the Greater Toronto and Hamilton Area. With work already underway to build a connected transit network that supports more frequent, electric, uninterrupted service, Metrolinx is looking at a number of locations for potential new stations. We know that access to stations, along with frequency of service, are key factors in convincing pedestrians, cyclists, transit users and drivers to use an expanded GO rail service Our goal is to have stations that are important hubs for daily activities, not simply arrival and departure points. Read about the new locations being considered as part of the plan to expand the regional transit network.

A number of station renovations are also taking place across the GO network to support more frequent, electrified GO train service. In addition, there is ongoing work to lengthen platforms, improve safety and accessibility, and add heated shelters and lighting.

The 2016 GO Rail Station Access Plan makes specific recommendations for improving access to GO stations within the next 15 years and will inform decisions on station access investments.

Parking Capacity

Since 2008, parking at GO Stations has grown by 19,000 spaces for a total of over 70,000 parking spaces across the GO network. GO Transit is currently the largest provider of parking in North America and while we know the importance of parking facilities for many communities across the region, as service increases we are also working with local transit providers and municipalities to make the first and last mile easier by strengthening access to stations by walking, biking, car sharing and local transit connections.

Union Station Rail Corridor Renewal

The Union Station Rail Corridor renewal program will allow us to get ready for a doubling of ridership over the next 10-20 years. The program will modernize the corridor through signal system renewal, computer-based train dispatching, consolidating dispatch offices, providing new routings to the Union Station platforms, eliminating track bottlenecks, increasing train speeds, improving platform access, and adding new snow clearing devices at rail switches. The target completion date for this work is 2019.

Started in 2010, the Union Station Revitalization Project is transforming Canada’s busiest transportation hub to ensure the station is ready to meet future, increased transit demand. Work includes the installation of a new glass atrium over the existing train shed, a new 62,000 square foot concourse, expansion of the existing Bay Concourse to 61,000 square feet, new staircases and elevators, new PRESTO payment devices, and new street level entrances.


Since the funding announcement for electrification in April 2015, staff with international expertise in electrification and a technical advisor (Gannett Fleming, Inc.) have been brought on board to support moving forward with the electrification of the rail network.

Pre-consultation activities on electrification began in 2016 and focused on building an understanding of electrification, the infrastructure required to support it and information on health and the environment.

Environmental Assessments

Barrie Rail Corridor Expansion Project

We are in the early stages of pre-consultation and working through the technical studies to prepare for the Transit Project Assessment Process (TPAP) that will review implementing additional tracks and supporting infrastructure from Lansdowne Avenue in the City of Toronto to the Allandale Waterfront GO Station in Barrie.

Learn more about the Barrie Rail Corridor Expansion Project

Caledonia GO Station

The Caledonia GO Station TPAP was approved on April 28, 2016. The new station will integrate with the future Caledonia Station on the Eglinton Crosstown LRT line, giving transit users a quick and convenient way to access both services. The proposed plan will connect the Eglinton Crosstown LRT and GO stations by a fully accessible pedestrian bridge that will span over the Barrie rail.

Learn more about the Caledonia GO Station

Davenport Diamond Grade Separation

The Davenport Diamond Grade Separation project is intended to eliminate the Davenport Diamond, one of the busiest train track intersections in North America, where CP freight trains and GO passenger trains intersect at a ground-level rail crossing. We are planning to build an elevated rail corridor that follows the current GO Transit route between Bloor Street West and Davenport Road.

The land underneath will be unlocked to possibly reconnect the community across the tracks and create potential public space and pedestrian/cycling trails. Metrolinx is using a Residents’ Reference Panel made up of 36 community members to help recommend what to do with the unlocked land to benefit our neighbours. This is one of the many ways Metrolinx will engage the community to get their feedback on how to leverage transit infrastructure to leave a lasting legacy for the community. Stay tuned for more detail by visiting the Davenport Reference Panel page.

Learn more about the Davenport Diamond Grade Separation

Guildwood to Pickering Project

To support RER, improvements are needed between Guildwood and Pickering. There are only two tracks between Galloway Road in Scarborough and Frenchman’s Bay in Pickering (“Durham Junction”) and this bottleneck currently creates an operational challenge for the entire line, meaning service isn’t as reliable or flexible as it could be.

Metrolinx completed a Transit Project Assessment Process for the project and received minister approval on January 9, 2017.

Don River to Scarborough GO Station

To support RER, improvements are needed between the Don River and Scarborough GO Station. An additional track is required to increase service to provide future 15-minute electrified service on the corridor.

Learn more about the Lakeshore East Expansion (Don River to Scarborough).

Union Station Rail Corridor (USRC) East Enhancements Project

The purpose of the Union Station Rail Corridor (USRC) East Enhancements Project is to expand and modify rail infrastructure in the eastern portion of the USRC to support increased passenger and train volume through:

  • Additional mainline track capacity
  • Increased train storage capacity
  • Increased track speed capabilities

Learn more about the USRC East Enhancement Project.

Lincolnville Layover and GO Station Improvements

The purpose of the Lincolnville Layover and GO Station Improvements project is to support improved service on the Stouffville Rail Corridor with the addition of three layover tracks and enhancements to the existing station and layover infrastructure.

Learn more about the Lincolnville Layover and GO Station Improvements Project.

Metrolinx is bringing more transit and more connections to more places within the Greater Toronto and Hamilton Area (GTHA). As we grow, our transit system needs to grow too. Every community transit project big or small plays a vital role in shaping the regional transportation plan.