GO Transit Signal Issue Causes Second Day of Delays

GO Transit riders faced a second straight morning of chaos Thursday as Metrolinx crews continued investigating a signal issue that has crippled the Lakeshore East line and forced service cuts affecting thousands of commuters.

The problem first triggered widespread delays during Wednesday's rush hour and persisted through Thursday as repair crews remained on scene working to identify and fix the fault. The issue is impacting train movements both east of Union Station and between Whitby and Ajax—two critical commuting corridors that feed downtown Toronto and connect communities across Durham Region.

Metrolinx has not provided a specific timeline for when full service will resume, leaving commuters to navigate alternatives or endure continued delays. The agency said crews are working around the clock to resolve the issue, but signal problems can be complex and time-consuming to diagnose and repair, particularly on a busy urban transit line.

For commuters dependent on the Lakeshore East corridor, the disruption underscores the fragility of aging transit infrastructure and the ripple effects a single mechanical failure can have across the entire system. Those with flexibility are advised to avoid the line through the end of the week and check Metrolinx's real-time service updates before heading to Union Station.