This article compares travel times for the 512 St. Clair streetcar for June 2026 and June 2019. It is part of a series setting out the changes in operating speed of streetcar routes since the introduction of the new Flexity streetcars in the past decade.

Three sets of charts here show the operational behaviour of the route from different points of view:

• Comparisons of travel speeds over segments of the line show broadly how, when and where travel speeds have changed.
• A fine-grained speed profile of the line compares 2019 and 2026 data showing specific locations of changes, and in particular that speed differences lie across the route.
• Charts of dwell times show locations and times where streetcars are held for passenger service and traffic signals. Congestion generally does not play a role because almost all of the route is on reserved lanes.

“Double stops” at traffic signals before farside loading islands remain a problem with streetcars not always getting a clear run through intersections. This is often discussed in transit and social media circles, but more work is needed to get true transit priority for streetcars on 512 St. Clair.

St. Clair also has very high terminal recovery times compared to travel time along the route. It is not clear that this time is needed, or if it is a relic of an era when TTC made service run “on time” by padding schedules so that it would never be late.