subway arrives at union

Yonge North Subway Extension

Extending Line 1 subway service nearly 8 km north from Finch Station to Richmond Hill.

Business cases

Initial Business Case and supplementary analysis

The Initial Business Case explores how the Yonge North Subway Extension will serve the heart of major growth centres while significantly cutting travel times and reducing greenhouse gas emissions.

Read the full Initial Business Case.

The accompanying supplementary analysis details the proposed alignment that is moving forward for additional analysis and design as part of the Preliminary Design Business Case planning process. This route takes into consideration the potential issues associated with construction and operations near certain lands adjacent to the alignment.

Read the full supplementary analysis.

Neighbourhood Stations Analysis

This study evaluated the benefits and trade-offs of Cummer, Clark and Royal Orchard stations to inform decisions on which fourth station to include in the project along with Steeles, Bridge and High Tech stations. The analysis also explored the performance of a potential fifth station to include in the project.

Read the full Neighbourhood Stations Analysis.

Environmental assessment

Environmental Project Report Addendum

The updated Environmental Project Report Addendum looks at the entire footprint of the Yonge North Subway Extension, from the existing Finch Station to north of the Richmond Hill Centre area. The report brings the existing environmental studies for the project up to date based on the latest plans for the extension, including the updated route, stations and train storage facility.

The public review period for this addendum ended on March 14, 2022.

Read the full report

Community meetings

View documents and materials from community meetings.