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Bike Share: Safe or Not Safe? A New Study on Brain Trauma Raises Questions

Bike Share: Safe or Not Safe? A New Study on Brain Trauma Raises Questions

As more and more cities add bike share programs, it’s important that we talk about safety, and for a lot of people that discussion comes down to helmets.

Rentals through bike share don’t usually offer bike helmets along with the bike — although some do, like Melbourne’s and the bike helmet vending machine in Boston – and that has made some people skeptical of how safe bike share programs can be.

Some were shocked to read a new study that looked at cities with bike share programs and the correlation to brain injury. The study reported that in the cities with bike share programs, the proportion of bicycle-related head injuries that led to admission to a trauma center increased by 14 percent.

That sounds like an alarming number, but in response, Kay Teschke, a professor who studies cycling in cities at the University of British Columbia, took a look at the report and the data. In going through the study, she found that actually, in cities with bike share, the total number of accidents actually decreased, with total injuries decreased about 28 percent, and total head injuries decreased about 14 percent.

As the Atlantic’s City Lab reported:

…now what do we know? Well, first, that head injuries did increase as a proportion of total injuries in bike-share cities after program implementation, and second, that aggregate annual injuries declined in bike-share cities even as they remained about the same in non-bike-share cities. The AJPH paper failed to mention the second and arguably more crucial point. So rather than conclude that bike-share systems might be increasing rider safety, the researchers argued that bike-share systems might improve head safety by offering helmets. In that sense, they seemed to miss the forest for the trees.

It’s important to remember that the data showed a correlation, not a causal link, between bike share cities and head injuries, and until more research is done, we can only speculate as to the reason why. It’s plausible to argue that as more people ride, these cities are becoming more accustomed to cyclists as well as the city putting in better infrastructure to support these bike share programs and promote the safety of its users.

Compare that to a study in the British Medical Journal earlier this year that showed that the rate of injury for bike share users was lower than cyclists in general, potentially attributed to things like designated bike paths and heavier bicycles.

But let’s get back to helmets. When it comes to helmets, and whether or not there should be laws requiring helmets with bike share programs, evidence for whether or not helmets reduce injuries is mixed. It’s hard to measure injury rates due to helmet legislation, but ultimately it comes down to this: whether or not a helmet reduces your risk for injury, if you do get in an accident, you are happy to be wearing one.

A bike helmet is a “last line of defense” as Washington Post writer Christie Aschwanden put it in a column last year, which means that we shouldn’t use a bike helmet as a replacement for all the other safety precautions we should take while cycling. I personally use bike share and carry my bike helmet with me, but I know that it’s not an excuse for being a bad rider, and in a bad crash, it may not save me. But I would rather wear it in the event that it does.

Discussing the safety of bike share programs is important, especially as bike share programs grow. We need smart programs and infrastructure in place that support safe cycling. More cities putting in more programs that encourage people to ride a bicycle is a good thing.

Maybe one day we’ll live in a world where all major cities have an extensive network of protected bike lanes, and cyclists won’t always feel like they’re pawns in a game of car traffic, but until then, let’s keep the helmets on.

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Photo Credit: Jeffrey Beall

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63 comments

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5:03AM PDT on Jun 26, 2014

I'm just joining the chorus of people who believe that better driver training is the key to bike safety. Of course, still BYO helmet - I've seen a biker go flying after a melon rolled into the road from a fruit stand.

2:39AM PDT on Jun 26, 2014

noted,thank you

4:37PM PDT on Jun 24, 2014

We need to get idiot drivers to stop texting, then I am sure people on bikes would be safer!

9:07AM PDT on Jun 24, 2014

More study is needed but certainly wearing helmets can help prevent injury more than not wearing a helmet. An interesting article.

Those worried about head lice can always bring their own helmet.

Certainly the addition of more bike paths/lanes will assist in promoting safety.

Alfred D maintains that where he lives cyclists are a menace and endanger those who are elderly and blind by riding on the pavement (does he mean on the sidewalk or all pavement in general?) He pointed out his unpleasant encounter with a cyclist. There are rude cyclists just as there are rude motorists.

He believes that cyclists need to know the highway code. (There are certainly motorists who should do the same thing, since some of them don't know how to drive, how they managed to get a driver's licence is beyond me). Some motorists can also do stupid things to put others and themselves in danger, so that is not limited to some cyclists. I also drive a car as well but don't really think that cyclists need to by law acquire insurance or pay toward a road tax, especially in my climate where the climate makes it difficult to drive a bicycle for a number of months in the year.

8:30AM PDT on Jun 23, 2014

ty

6:46AM PDT on Jun 23, 2014

Steve, I bet the study is sponsored by car manufacturers!

2:18PM PDT on Jun 22, 2014

thanks

2:04AM PDT on Jun 22, 2014

interesting article

12:32PM PDT on Jun 21, 2014

Thanks for sharing

8:22AM PDT on Jun 21, 2014

People must have their own helmet--share the bike only. Bike programs are wonderful+it's really great to see so many now around the globe.

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