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.
Trump Administration Could Effectively End Housing Voucher Program
Federal officials are eyeing major cuts to the Section 8 program that helps millions of low-income households pay rent.
Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.
Ken Jennings Launches Transit Web Series
The Jeopardy champ wants you to ride public transit.
Washington Legislature Passes Rent Increase Cap
A bill that caps rent increases at 7 percent plus inflation is headed to the governor’s desk.
From Planning to Action: How LA County Is Rethinking Climate Resilience
Chief Sustainability Officer Rita Kampalath outlines the County’s shift from planning to implementation in its climate resilience efforts, emphasizing cross-departmental coordination, updated recovery strategies, and the need for flexible funding.
New Mexico Aging Department Commits to Helping Seniors Age ‘In Place’ and ‘Autonomously’ in New Draft Plan
As New Mexico’s population of seniors continues to grow, the state’s aging department is proposing expanded initiatives to help seniors maintain their autonomy while also supporting family caregivers.
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.
Heyer Gruel & Associates PA
Ada County Highway District
Institute for Housing and Urban Development Studies (IHS)
City of Grandview
Harvard GSD Executive Education
Toledo-Lucas County Plan Commissions
Salt Lake City
NYU Wagner Graduate School of Public Service