Updated December 11, 2021 at 6:30 pm: A chart showing the total hours in service for each eBus for 2021 has been added to the article.
Updated December 16, 2021 at 7:00 am: Charts showing fleet usage on a percentage basis for each vendor have been added to the end of the article.
Updated January 9, 2022 at 10:15 am: Charts including December 2021 data have been replaced to include day to the end of the year.
This article is an update on my previous review of stats for the eBus fleets from July to December 2021. Readers coming to this thread for the first time should read both articles.
The intent here is to go back six more months in the data to see whether there has been a change in the usage patterns of the three eBus fleets over the full year.
A complete set of charts for the year is linked at the bottom of the article in PDF format.
The year’s data show that the New Flyer eBuses were in service the most, although a few of the BYD buses managed daily periods in service that were longer. Many of the Proterra and BYD buses spent extended periods out of service, a much less common issue with the New Flyers.
The hours of service logged by a comparison group of Hybrids and Artics were consistently higher than the eBuses, although individual vehicle ranges overlap.
How Much Was Each Bus In Service
The table below shows for each of the 60 Buses the number of hours per month that they were tracked in service on a route, as opposed to sitting in the garage, or not visible to the tracking system. As before, all data have been extracted from logs on the TransSee website (Premium version), and those data in turn comes from the TTC’s vehicle tracking feed.
For comparison, 25 Hybrids and 25 Artics are shown for September 2021. Any vehicle which showed no activity in the month is flagged with a pink stripe.
In graphic format, here are the values for the Flyer fleet.
- Each group of columns has one month’s data.
- Within each month, each column represents one bus.
The variation in hours/month is clear between vehicles and in different months through the year. Note that December is an incomplete month and so the values are much lower. Also, there is no adjustment for the length of months (31, 30 or 28 days).
Here are the values for the Proterra fleet. Note that the columns are shorter and the data sparse compared to Flyer above. This is due to the number of vehicles that were out of service (missing columns) and the lower utilization of those that did operate.
The data for BYD show some higher individual values than the Flyer fleet, but also a lot of gaps and low values indication vehicles that were out of, or only minimally in service, especially late in the year.
Some of the higher values are due to BYD buses that managed to remain in service for more consecutive hours rather than having either a split day, or only one 4-5 hour tour. To what degree this reflects inherently better performance, and how much of the difference is due to dispatching practices at each garage (each fleet is at a different garage) is hard to know. When they run, some of these buses rack up considerable hours, but only one bus logged hours in all twelve months (3755) and one bus was out of service for eight month in the year (3750).
Another way to look at these data is the total in service hours for each vehicle. On this basis, Proterra fared the worst. BYD was better for selected vehicles, not for the fleet as a whole.
Concurrent Buses in Service
As in the previous article, I produced charts showing the number of buses, by type, in service each hour through the period. Three things show up in these charts:
- There is a characteristic double spike on weekdays showing that many vehicles returned to the garage between peak periods.
- The number of Flyers in service at peak is consistently higher than the number of Proterras.
- BYD rarely fielded more than half of its 10-bus fleet.
There was almost no usage of the Flyer fleet between May 2 and 9, and the Proterra fleet was also less-used than in previous months. BYD availability picked up in May.
June saw a return to the typical usage pattern with the Flyers in service the most. In all three cases these are not impressive figures considering that most of the time even the Flyers barely reach 60 percent usage at peak. To what degree this reflects TTC service levels that are far below total fleet capability, and to what degree it shows a reluctance to use the vehicles, is hard to tell. The relative numbers, however, are hard to argue with.
Fleet Utilization Percentages
In response to a desire to see fleet utilization numbers on an equalized basis, here are three charts showing the percentage of each fleet in service throughout 2021. There is a clear difference between the chart for New Flyer compared to the other vendors.
PDF for the full set of charts.