The Toronto Star reports today that the Toronto Transit Commission (TTC) and a waterfront development agency are at loggerheads over a planned new streetcar corridor.
The essence of the conflict is this:
The Toronto Transit Commission wants to experiment with track design on a new streetcar route to speed up Toronto’s failingly low streetcar speeds (between 10 and 12 km/hr, on average). Their solution is to place both track directions on the North side of Queens Quay (a major waterfront boulevard), and place both directions of vehicular traffic on the south side.
(Note: Traditionally, streetcars are placed in the center of a roadway with – say – eastbound streetcars moving on the same side of the street as eastbound traffic and westbound streetcars moving on the same side of the street as westbound traffic).
Neither the TTC nor the article offered an explanation as to how, why, or if this plan would increase average streetcar speeds. Nevertheless, TTC officials quoted in the article claim that according to their plan streetcars would experience average speeds of 13 – 15 km/hr, a significant speed premium.
Waterfront Toronto (the development agency), however, envisions a 3 km long stretch of Queen’s Quay with up to 20 separate traffic lights to contend with the myriad of developments they have in the area. Of course this 3 km long stretch of roadway is the same as that which is to be used for the TTC’s new streetcar line.
For those who are counting, Waterfront Toronto’s plan would result in 1 traffic light every 150 meters.
TTC officials state that so many traffic lights would result in a streetcar line “even slower” than other Toronto streetcars (those within the 10 – 12 km/hr range).
Waterfront Toronto officials, however, contend that their plan for having extended greens and transit signal priority (TSP) schemes along the stretch would result in average speeds of 16.6 – 19.5 km/hr.
As I’ve argued before, transit signal priority schemes have a very dubious track record and there is little consensus about whether the technologies actually work (at least in a North American sense). At best, TSP seems to reduce travel times (and increase travel speeds) by around 6 – 10%. At worst, it actually increases travel times and reduces speed.
Waterfront Toronto, however, is convinced that their TSP plan would result in an increase in travel times of roughly 65%. This speed increase, meanwhile, would be realized in a corridor with 43% more traffic lights than some of the most congested sections in all of downtown Toronto.
The TTC accurately described the plan as “death by a thousand cuts.”
Something doesn’t make sense here. Both Waterfront Toronto and the TTC cannot be right. Both could however be wrong. That they differ in their opinions so widely suggests someone’s (or both’s) forecasting models are severely flawed.
At the end of the day, what this quibble shows is this: Road based transit speed has almost nothing to do with technology choice. Speed and travel times is dependent almost entirely on how the technology is implemented in relation to its surrounding environs.
Transit enthusiasts, advocates, planners and researchers need to get out of the habit of saying their technology preference is the fastest. After all, as the above demonstrates, your technology preference could be the fastest but it could also be the slowest.