My recent article for NOW Toronto, TTC Bus Service Losing Ground, reviewed the problem of passenger congestion on TTC bus routes and the long-standing failure of service to keep up with the rising population and employment in Toronto. This article presents the details and the wider context.

When Transit City was proposed back in 2007, the TTC expected that over the course of its implementation a large number of buses would be replaced by an LRT network that would, by today, be substantially complete. In turn, this would reduce the need for new bus storage and maintenance facilities because the growth would occur in suburban LRT barns at the Mount Dennis yard on the Eglinton line, on Finch near Highway 400, and on Sheppard East at Conlins Road.

One new garage was planned in Scarborough, although the project was delayed by Mayor Rob Ford. The garage on McNicoll will finally open late in 2020. However, the demand for storage space at existing overcrowded garages simply means that McNicoll will be full the day it opens and the TTC will be back in a situation where fleet expansion requires garages to have more buses than they were designed for. A ninth bus garage sits in the long term plans with a 2031 opening date, but there is no funding for it and the TTC has yet to identify a potential property. They will remain short of garage space for the coming decade.

This creates an odd sort of response to requests for more service: we have no place to store the buses. That, of course, is a chicken-and-egg situation where the TTC (and the City) can avoid the cost of providing more service by claiming that they couldn’t run more buses if they wanted to. Unfortunately, this does not accelerate the provision of more garage space, and the service vs storage deadlock remains.

The amount of service the TTC fields every day is affected by several factors:

• the size of the fleet
• the average capacity of a bus
• the average age and reliability of the fleet
• the proportion of the fleet needed for maintenance spares
• the number of buses required to supplement the streetcar network
• the number of buses reserved for extra service, especially to handle subway emergencies
• the budget for service

As the TTC migrated from a fleet of high-floor to low-floor buses, the capacity of vehicles dropped by about ten percent. This meant that more buses were required to provide the same level of service, a process that occurred gradually until late 2015 when the last of the high-floor buses were retired. Conversely, low-floor two-section articulated buses can carry about 50% more passengers than a standard bus. These vehicles began to appear in the TTC’s fleet in 2014, but they make up less than 10% of the fleet today. The only planned expansion is for the TTC to buy 68 more in 2021.

Older buses tend not to work as reliably as young ones, and if a fleet is not regularly replaced, a higher proportion of it can fall into those “twilight years” when maintenance needs are higher and buses are more likely to fail in service. The TTC used to keep its buses for about 18 years and overhauled them twice during their lifespan. The argument for this was that the overhauls were cheaper than simply buying a new bus.

However, the bus building industry no longer produces vehicles with a long intended lifespan, and 12 years is a more common retirement age. This also avoids the need for that second overhaul to keep an older bus on the street.

The TTC has shifted to a 12 year replacement cycle for buses, and took advantage of federal “stimulus” funding to replace many older vehicles that otherwise would have remained in service. This gets over the one time “hump” of changing to a shorter life-cycle, but it also accelerates the need for ongoing spending because the annual replacement rate is now 50% higher – about 180 buses per year, rather than 120. This budget effect is compounded by the shift to more expensive hybrid or all-electric vehicles.

The newer generation of buses is also more technically complex, and a larger proportion of the fleet is required for spares to ensure that maintenance is preventative, fix-before-break work rather than gambling that a bus will continue to run even after it should have come into the shop for a check-up. A few years ago, the TTC changed its maintenance practices so that buses cycled through routine inspection and repair more frequently with the aim of reducing in-service failures. This had the desired effect, but at a cost of taking a larger maintenance pool from the fleet than in past years.

Finally, new buses often go through retrofit programs during their warranty period, and this further increases spare requirements if there is a sudden influx of new buses in a short time period.

That’s just the story on the maintenance side, but there is also the dreaded line whenever service is discussed: “subject to budget availability”. In other words, even if there are enough buses to improve service, there may not be the operating budget dollars (and the drivers this would pay) to actually field more vehicles.

Both the streetcar and subway networks make demands on the bus fleet.

It is no secret that the TTC has had problems with both its old and new streetcar fleets, but the biggest problem now is that growing demand on the streetcar routes exceeds the capacity of the new streetcar fleet.

• When there were too few streetcars to operate that network, buses substituted to make up the difference.
• Traffic congestion continues to worsen leading to slower service.
• Construction projects shut down parts of the streetcar network from time to time.

At various times over recent years, there have been buses running on portions of Carlton, Dundas, Queen, King, Kingston Road and Bathurst. Some of these cases have been complete replacements while others are on portions of lines affected by construction.

With the streetcar shortage, construction work provided a rationale to bus a route and free up vehicles, but this grew beyond beyond construction season to semi-permanent replacements.

During the summer, the TTC has surplus vehicles and streetcar substitutions do not affect the availability of buses on bus routes.

Long-running projects (such as the water main reconstruction on Dundas) and route conversions due to a shortage of streetcars (such as on Kingston Road) are another matter. These take buses away from the bus network during the peak season. That said, the number of buses involved has been overplayed in some circles primarily as a way of carping about the Bombardier cars or about streetcars in general.

Subway shuttles place their greatest demand on the bus fleet when emergencies occur during the peak period. There are some vehicles at each garage that are “run as directed” buses, but these are nowhere near enough to make up for losing a busy part of the subway system. If there is a peak period shuttle, it requires not just the spare buses but vehicles and operators “borrowed” from other routes.

There is always a balancing act between having enough spare buses and staff to drive them for most emergencies, and the cost of having unused resources that are always a target for the budget hawks looking for “waste” in the TTC.

All of these factors affected and constrained the growth in bus service over the past decade, and will continue to do so without a significant change in TTC planning and funding policy.

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