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.
Data Shows Chicago Speed Cameras Reduce Speeding, Crashes
Countering claims made by the Chicago Tribune that automated enforcement doesn’t improve safety, Streetsblog Chicago lays out the data showing how traffic safety fared in camera zones.
Montreal Mall to Become 6,000 Housing Units
Place Versailles will be transformed into a mixed-use complex over the next 25 years.
Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.
DARTSpace Platform Streamlines Dallas TOD Application Process
The Dallas transit agency hopes a shorter permitting timeline will boost transit-oriented development around rail stations.
Without International Immigrants, the Rural US Population Would Be Falling 58%
Census data shows that population growth in rural areas is due in large part to international migrants.
Dead End: Nine Highways Ready for Retirement
The Freeways Without Futures report describes the nation’s most promising highway removal proposals.
Congressman Proposes Bill to Rename DC Metro “Trump Train”
The Make Autorail Great Again Act would withhold federal funding to the system until the Washington Metropolitan Area Transit Authority (WMATA), rebrands as the Washington Metropolitan Authority for Greater Access (WMAGA).
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.
City of Mt Shasta
City of Camden Redevelopment Agency
City of Astoria
Transportation Research & Education Center (TREC) at Portland State University
City of Camden Redevelopment Agency
Municipality of Princeton (NJ)
Regional Transportation Commission of Southern Nevada