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
Why Bike Lanes Are Good: An Explainer for the US Transportation Secretary
Sean Duffy says there’s no evidence that bike lanes have benefits. Streetsblog — and federal agencies’ own data — beg to differ.
Proposed Bill Would Direct Funds to Road Safety
The Sarah Debbink Langenkamp Active Transportation Safety Act was spurred by the death of a U.S. diplomat who was killed on her bicycle.
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Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.
Chicago’s Ghost Rails
Just beneath the surface of the modern city lie the remnants of its expansive early 20th-century streetcar system.
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The region spanning the two central Texas cities is growing fast, posing challenges for local infrastructure and water supplies.
Since Zion's Shuttles Went Electric “The Smog is Gone”
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Trump Distributing DOT Safety Funds at 1/10 Rate of Biden
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German Cities Subsidize Taxis for Women Amid Wave of Violence
Free or low-cost taxi rides can help women navigate cities more safely, but critics say the programs don't address the root causes of violence against women.
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
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