Updated Oct. 29 at 2:35pm: The service chart showing crowding levels has been revised with adjusted colouring, and to give emphasis to lines so that they stand out better. See the end of the article for a sample.
Updated Oct. 27 at 8:45pm: Sample charts have been added at the end incorporating some suggested changes.
This article continues my search for clear ways to display vehicle crowding data that I now receive as part of my data feed from TTC. In previous articles, I have shown vehicle tracking charts colour coded for the crowding index.
These charts show the regularity (or not) of service, locations of delays, bunches and gaps, and the resulting crowding pattern. This is useful for fine-grained analysis, but one must look at many charts to see the overall patterns.
In an attempt to “zoom out”, I developed a new chart format that shows the proportion of service at each crowding level seen at screenlines along a route by time of day. This article presents the results for the routes already published, but I wanted to nail down the format before publishing more. (I have many more in the wings including 25/925 Don Mills, 29/929 Dufferin, 36 Finch West, 39/939 Finch East, 41/941 Keele, 52/952 Lawrence, 53/953 Steeles East, 60/960 Steeles West, 85/985 Sheppard East, 86/986 Scarborough, 89/989 Weston, 116 Morningside, 129 McCowan North, 903 STC Express, and 905 Eglinton East Express).
Regular readers will know that I abhor the TTC’s practice of reporting service stats on monthly averages with every trip combined to give an overall picture. This hides a lot of things, notably the variations by hour and location, not to mention variations between routes. The chart format proposed here attempts to strike a balance between a hyper-detailed view and one where readers can see how routes behave at a level they can relate to their own journeys.
Does the new format shown here work for readers? Please let me know in the comments. I can do a lot of preparatory work on the other routes, and then drop their stats into whatever the final chart template looks like.
Many thanks to those who have sent suggestions regarding other charts I have published.
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Steve Munro 