In this section of my review of bus and streetcar operations on Queen Street, I turn to a comparison of operating speeds by each type of vehicle over the route. The charts presented here show operating speeds for the first week of May 2017 (streetcar) and the second week (bus) between Neville Loop and Roncesvalles.
By way of introduction, here is one page from a set of charts.
On this chart, streetcar data are plotted in orange and bus data in blue. The streetcar data are “on top” so that bus data peek out from behind showing the peaks where buses are operating faster than streetcars.
Each chart set has many pages, one for each hour of the day from 6:00 am to midnight. The values plotted give the average of vehicle speeds along the route. The example above shows vehicles westbound on Queen during the PM peak hour of 5:00 to 6:00 pm. The chart should be read from left-to-right, the direction of travel. (Charts for eastbound operations have the same layout, but should be read from right-to-left.) The sawtooth form of the chart arises from locations where vehicles stop and the spaces in between where they are in motion.
Approaching a stop, especially one where there is a backlog of traffic from the stop, there will be a gradual decline in speed, but then a fast pickup afterward as the vehicles move off. Locations with serious congestion and queueing will show up as an extended area of low speed corresponding to vehicles creeping forward to the stop.
The evolution of traffic speeds over the day can be reviewed as an animation by stepping back and forth through the pages. This shows both the rise and fall of speeds hour-by-hour and the change in the degree to which buses operate faster than streetcars in some locations.