Study: Safety in Bike Numbers Found on the Streets of Boulder, Colorado

The high mode share of bikers in Boulder, Colorado allowed researchers to verify findings already documented by researchers in Europe.

"A University of Colorado Denver study examining collisions between bicycles and motorists, shows bicyclist safety significantly increases when there are more bikes on the road, a finding that could be attributed to a 'safety in numbers effect,'" according to an article on PhysOrg.

"The researchers wanted to create safety performance functions (SPFs) for bicycles in Boulder. SPFs model the mathematical relationship between the frequency of crashes and major factors related to them. Yet while there are SPFs for vehicles, there are none for bikes."

"The authors created their SPF for Boulder by studying crashes at intersections throughout the city where more than two-thirds of collisions occur. They compared the crash data to bicycle count data."

Full Story: Study shows more bicyclists on road means fewer collisions

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