In all the debates about streetcar operation and lack of speed, there is little by way of an overview of where the problem locations and times really are. There are discussions of track switching technology, signal priority (or the lack of it), whether stops are too close together, and operating practices such as standing slow orders at various locations. Much less so a line-by-line review to see where the worst problems lie, and where the greatest opportunities for improvement might be found.

Some advocates claim that an improvement of as much as 40% might be achieved in streetcar speeds, although this has too often been misinterpreted as an absolute number, not a best case target. It is worth noting that some routes, segments and times of day already achieve much higher average speeds. The question then is what prevents this from being standard operation across the system.

This post uses vehicle tracking data to plot average vehicle speed, by hour, over segments of each streetcar route for June 1-5, 2026. This interval was chosen because it was just before the onset of special services and conditions related to the World Cup, but during the moratorium of works and diversions that could have distorted the data.

In Part II, I will take a deeper dive into specific problem areas on some lines, and look at comparative data from pre-covid times.