The purpose of this article is to delve into the data on the behaviour of King Street transit at an even more finely-grained detail than in past articles. The presentation here focuses on:
- Hourly variations in travel times.
- Daily variations based on the day of the week, including weekends.
The data are the same as those used for previous articles, but with changes in presentation to bring out different aspects of the “story” that they tell. In particular, it is important to examine the data at a level of detail sufficient to see where variations exist and where they do not. Averages over several days and over multi-hour periods simply do not reflect the way the line behaves.
A fundamental purpose of the King Street Pilot is to “shave off” the worst of the transit delays caused by congestion. For periods when traffic is free-flowing, there will be little or no change because nothing was “in the way” to begin with. Expectations of large savings in travel time can really only apply to periods when service was likely to be disrupted. This can vary from hour to hour, by day of week, due to special events, weather, and other factors. The whole point is that if the worst of the disruptions are eliminated, service will more reliably be at close to “best case” conditions.
The source data for this and all other studies of transit operations I have published come from the TTC’s vehicle tracking system. Subject to the caveat that some data must be discarded thanks to wonky GPS readings of vehicle location, this represents as close to a 100% sample as one is likely to achieve. The data are from January 2016 to February 2018, except for February 2016 which I do not have.
There are several sets of charts here, and this article is intended to take the reader through progressively more detailed views.
Complete chart sets are provided in linked PDFs, and only a few of these are presented as illustrations in the body of the article to save on space.
I leave exploration of the charts to readers with the hope that this shows the kind of detail that is available, and that a closer look is needed to see how the route behaves under various conditions. As the year goes on, I will update these charts periodically with additional data to examine whether better weather, more activity and special events disrupt what has been, so far, a clear improvement in transit’s performance on King Street.