GO Expansion – Details Emerge, Timing Slipping
By Transport Action Ontario | Latest News , Urban Transit
Transport Action Ontario has long been a strong supporter of the GO Expansion project, which proposes an ambitious plan to introduce 15 minute or better all-day two-way electrified passenger rail service on core portions of 5 GO lines, plus improved service on the remainder of the network. However, as described in our posting of June 28, 2025, problems began to emerge last year with the termination of a contract with ONxpress Operations over “differences of opinion” and hints of “descoping”. Few details were available.
In December, 2025, Metrolinx released a helpful high-level roadmap of the numerous steps needed to achieve its expansion goals, with a chart called Corridor “Missions” Guiding Incremental Growth. For example, it identified 16 steps needed to achieve the mission on the Stouffville line, ranging from smaller items like station improvements and extra track to large system-wide missions like electrification, ETCS signaling and fleet procurement. However, the chart showed no timing.
Further details have emerged in March, based on an internal staff report on fleet strategy obtained by the media. Based on these reports, electrification of the Lakeshore East and West lines is not planned until 2036, with other lines following. Due to the numerous level crossings in the network, service will not involve short trains at very high frequencies (3 to 8 minute headways), but remains as longer trains with 15 minute headways.
While the prolonged schedule is a disappointment, the Province does seem committed to the project and construction continues on many pieces. In fact, Ontario is doing advance planning on a further expansion called GO 2.0 and is requesting federal support funding.

