Are two-way (or bidirectional if you prefer) protected bike lanes "dangerous"? Some of the opposition to the Harbord proposal are fomenting fear and doubt by claiming as much. There's even a "No Danger Lanes" facebook page decrying the bidirectional for Harbord.

Let's put this question a different way. Has there been an uproar in Montreal about death and destruction because of their plentiful bidirectional bike lanes? Has there been a bloodbath that we've been ignoring?

I might have missed something but I think not. Montrealers seem to be plenty angry at their corrupt mayors but when it comes to their bidirectional cycle tracks (aka protected bike lanes), the overwhelming majority of people seem to be happy and there's been no outcry of cyclists getting injured on them in great numbers.

And Montreal isn't alone. Cycling nirvanas like Amsterdam also have bidirectional cycle tracks and the people seem to be happy with them, or at the very least accepted them.

A bi-directional path. Photo: Mikael Colville-Andersen.

So let's use some common sense. Two-way cycle tracks are not dangerous. They are safe and people are comfortable with them.

Is this a bloodbath you were looking for?

You might say, "Well that's all well and good but what about this Montreal blogger who seems to have discovered the dangers of Montreal bidirectional?"

Let's take a look.

This Montreal blogger is David Beitel who made a claim that the cycle tracks in Montreal have an "elevated risk" of cycling accidents. He pointed out that two of the cycle tracks had the second and third highest number of accidents between cyclists and drivers in Montreal out of all streets.

You might exclaim: holy crap, why are all these cyclists getting injured on cycling infrastructure? Let's rip it all out!

But let's not get carried away. Beitel falls for a common error: he provides absolutely no context to the data; no denominator to put his data into proper perspective. The denominator we need here is the number of people cycling on each street.

Without a denominator of the cycling traffic volume, we might as well just conclude that riding on a highway like the Gardiner Expressway is the safest. Highways typically have very few cycling crashes. But they also usually have next to zero cyclists using them. Because it's illegal.

Beitel's approach cannot avoid absurd conclusions.

When we take into account cycling traffic volumes we would find that the cycle tracks in Montreal, such as De Maisonneuve and Berri, are actually not dangerous at all. When cycling traffic increases we will typically see some uptick in the number of car-bike collisions. And we realize that even though a highway may have zero cyclist colliding with drivers, it might be because there were no cyclists there.

So Beitel's conclusions are junk and anyone here in Toronto who references Beitel as "proof" of the danger of bidirectional is plain wrong. If you're curious you can read a bit more about this in the Evidence Training Guide created for cycling educators by the Cycling in Cities group at the University of British Columbia (particularly pages 2, 3 and 43 in the sidebar).

Bidirectional cycle tracks are probably safer

Of the scientific evidence we do have, we could make a safe bet that 1) bidirectional cycle tracks are probably safer than riding on the road and 2) cycle tracks in general are safer than bike lanes.

In a study headed up by Harvard's Dr. Lusk, it found that Montreal's two-way cycle tracks were shown to be "either lower or similar injury rates compared with bicycling in the street without bicycle provisions".

Lusk found that Rue Berri (as pictured above) had a lower risk (0.48) than the reference street of Denis. Reference streets are always considered to be 1 for comparison purposes. Being below one means a street is safer than the reference.

Overall, the study found that the cycle tracks they studied (all of which were bidirectional) had a 28% lower injury rate. Lusk concluded that their "results suggest that two-way cycle tracks on one side of the road have either lower or similar injury rates compared with bicycling in the street without bicycle provisions. This lowered risk is also in spite of the less-than-ideal design of the Montreal cycle tracks, such as lacking parking setbacks at intersections, a recommended practice."

Cycle tracks (one and two-way) are safer than the road

Cycle tracks in general are safer than both riding on the road or even riding in a painted bike lane. The following diagram from UBC's study of injuries and bike infrastructure describes it well:

Cycle tracks beat all the other options for on-road infrastructure by a mile.

Where possible, build unidirectional otherwise bidirectional works

This all being said, the cycling infrastructure guides are now usually recommending unidirectional over bidirectional. Vélo Québec's Planning and Design for Pedestrians and Cyclists, for instance, says (p. 80):

"On-road bike paths should preferably be unidirectional. Bi-directional paths offer effective safety between intersections but complicate traffic at intersections. In fact, they increase the number of conflict points between bicycles and turning vehicles."

"Preferable" but not always possible.

This is fine in an ideal world. But we live in a world with physical and political constraints. We don't have the political sway to force politicians to ignore merchants and take out all the parking on any of our major arterials. Bidirectional is seen as a compromise: cyclists get something safer, more comfortable and merchants get to keep some on-street parking. For instance, Councillor Vaughan has publicly stated that on Harbord it is bidirectional or nothing:

“The bi-directional protects the parking that is needed,” says Vaughan. When asked for specific numbers his assistant helps out: “Right now there are 48 parkings spots – and with the bi-directional plan, we are trying to salvage 95 to 98 per cent of parking.” The unidirectional plan would take out all of the on-street parking.

“If the choice is bi-directional or nothing then bi-directional is safer,” says Vaughan.

So we are fighting for bidirectional on Harbord and possibly on more streets in the future with similar constraints. And we will work with traffic planners and the community to make them as safe as possible. There are number of tools at the planners' disposal: separate light phases, improved sightlines, markings through the intersections, signage, bump-outs and so on.

References

• Bicyclists' Injuries & the Cycling Environment ("the BICE Study"), Cycling in Cities, University of British Columbia
• Lusk, A., Furth, P., Morency, P., Miranda-Moreno, L., Willett, W., Dennerlein, J. (2010). Risk of injury for bicycling on cycle tracks versus in the street. Injury Prevention.
• Evidence Training Guide by Cycling in Cities, University of British Columbia.