People on subway

Ontario Line

A new 15.6-km subway line in Toronto that will run from Exhibition Place, through downtown, all the way to the Ontario Science Centre.

Business cases

Preliminary Design Business Case

The Preliminary Design Business Case provides a clearer picture of how the Ontario Line will benefit riders, communities, and the region as a whole thanks to feedback received through consultations and additional planning and design work that have taken place since the release of the Initial Business Case in 2019.

Read the full Preliminary Design Business Case for the Ontario Line.

Environmental assessments

The Environmental Conditions Report characterizes environmental conditions within the Ontario Line study area through a combination of desktop review and field studies in accordance with industry standard techniques, protocols and guidelines.

Read more

Land Acknowledgement

Metrolinx acknowledges that it operates on the traditional territory of Indigenous Peoples including the Anishnabeg, the Haudenosaunee and the Wendat peoples. In particular these lands are covered by 20 Treaties, and we have a responsibility to recognize and value the rights of Indigenous Nations and Peoples and conduct business in a manner that is built on the foundation of trust, respect and collaboration. Metrolinx is committed to building meaningful relationships with Indigenous Peoples, and to working towards meaningful reconciliation with the original caretakers of this land.