Industrialized Cyclist Notepad


The God that failed

Pinka Chatterji and Sara Markowitz, “Effects of Bicycle Helmet Laws on Children’s Injuries.” NBER Working Paper No. 18773. February 2013. JEL No. I0,K0

ABSTRACT
Cycling is popular among children, but results in thousands of injuries annually. In recent years, many states and localities have enacted bicycle helmet laws. We examine direct and indirect effects of these laws on injuries. Using hospital-level panel data and triple difference models, we find helmet laws are associated with reductions in bicycle-related head injuries among children. However, laws also are associated with decreases in non-head cycling injuries, as well as increases in head injuries from other wheeled sports. Thus, the observed reduction in bicycle-related head injuries may be due to reductions in bicycle riding induced by the laws.

Pinka Chatterji
State University of New York at Albany Economics Department

Sara Markowitz
Department of Economics Emory University

The auto industry loves mandatory helmet laws.



What kids do to bike accident stats

Especially in suburban areas. Here’s Mesa, AZ 2005.

http://www.cityofmesa.org/transportation/pdf/bike_analysis.pdf

via The Industrialized Cyclist Research Page


click to enlarge



“The Teschke Study”

Objectives. We compared cycling injury risks of 14 route types and other route infrastructure features.

Methods. We recruited 690 city residents injured while cycling in Toronto or Vancouver, Canada. A case-crossover design compared route infrastructure at each injury site to that of a randomly selected control site from the same trip.

Results. Of 14 route types, cycle tracks had the lowest risk (adjusted odds ratio [OR] = 0.11; 95% confidence interval [CI] = 0.02, 0.54), about one ninth the risk of the reference: major streets with parked cars and no bike infrastructure. Risks on major streets were lower without parked cars (adjusted OR = 0.63; 95% CI = 0.41, 0.96) and with bike lanes (adjusted OR = 0.54; 95% CI = 0.29, 1.01). Local streets also had lower risks (adjusted OR = 0.51; 95% CI = 0.31, 0.84). Other infrastructure characteristics were associated with increased risks: streetcar or train tracks (adjusted OR = 3.0; 95% CI = 1.8, 5.1), downhill grades (adjusted OR = 2.3; 95% CI = 1.7, 3.1), and construction (adjusted OR = 1.9; 95% CI = 1.3, 2.9).

Conclusions. The lower risks on quiet streets and with bike-specific infrastructure along busy streets support the route-design approach used in many northern European countries. Transportation infrastructure with lower bicycling injury risks merits public health support to reduce injuries and promote cycling. (Am J Public Health. Published online ahead of print October 18, 2012: e1-e8. doi:10.2105/AJPH.2012.300762)

via American Public Health Association – Route Infrastructure and the Risk of Injuries to Bicyclists: A Case-Crossover Study.



Former Denver Councilman and mayoral candidate Linkhart hit by truck on Bike to Work Day

He was my favorite mayoral candidate. He has almost no TV charisma, which is a major plus for a public official. He would have made a fine mayor. He liked libraries.

Fortunately, he’s fine, but the incident did prompt a conversation between council members and the mayor about road safety regulations and the interactions between cyclists and vehicles.

…During which, of course, scofflaw bicyclists somehow came out the villains, and education and/or reprogramming of scofflaw bicyclists was re-hurled to the tippy top of the bike safety priority list. This even though Linkhart’s crash (1) did not involve a scofflaw bicyclist and (2) car-bike crashes involving adult bicyclists typically do not. The most likely scenario for an adult bicyclist is to be caught out by another road user’s looked-but-failed-to-see error while riding lawfully. But hey, we’ve all seen bicyclists run lights right? People like Mayor Hancock make no attempt to understand the truth about urban cycling safety. Why bother — everyone knows it’s “common sense.” Common sense is good politics. Let’s not let any facts get in the way of our “common sense” about bicycle safety.

According to Linkhart, he was heading west on 23rd Avenue — on a bike route — approaching Downing Street when a pickup truck went to make a left turn and collided with him.

“I was going straight. He turned left in front of me, and…hit me across the side, and I fell down,” Linkhart recalls.

… Linkhart was scraped up badly, his bike got a bit bent and he had to get several stitches in his leg.

“I kinda went flying,” he said. “I kind of plowed into the sidewalk. I had a helmet, which didn’t help.”

Linkhart, going straight, had the right of way over the pickup truck, which was turning left.

23rd and Downing is classic left cross territory. I’ve been through that intersection a hundred times. Got to ‘keep your head on a swivel’ so to speak.

via Westword Doug Linkhart, ex-councilman, hit while cycling to Bike To Work Day event – Denver News – The Latest Word.



Leipheimer hit from behind in Spain, injured but OK
April 3, 2012, 01:51
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