This 4-page summary report (PDF) is a summary of a technical paper attempting to show differences in the reduction in road crashes that result from road diets.
From the study: "A road diet involves narrowing or eliminating travel lanes on a roadway to make more room for pedestrians and bicyclists. (They) are often conversions of four-lane, undivided roads into three lanes-two through lanes plus a center turn lane."
The study was conducted in California, Washington and Iowa:
"The Iowa data indicate a 47 percent reduction in total crashes while the HSIS (California and Washington) data indicate a 19 percent decrease-a substantial difference."
It's clear from the results that road diets do reduce crashes - the only issue appears to be just how great a reduction.
Thanks to Transportation Research E-Newsletter
FULL STORY: Evaluation of Lane Reduction "Road Diet" Measures on Crashes
Indy Neighborhood Group Builds Temporary Multi-Use Path
Community members, aided in part by funding from the city, repurposed a vehicle lane to create a protected bike and pedestrian path for the summer season.
Has Progress on Travel Safety Run Off the Road?
Changing technology and rebuilding infrastructure to improve road safety are long-term strategies. How can enforcement and interventions that influence driver behavior make a difference in reducing traffic deaths sooner?
Boston Ordinance Would Regulate Delivery Drivers
A proposed law would require delivery companies to acquire insurance, permits, and submit monthly reports to the city.
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.
Driving Equity and Clean Air: California Invests in Greener School Transportation
California has awarded $500 million to fund 1,000 zero-emission school buses and chargers for educational agencies as part of its effort to reduce pollution, improve student health, and accelerate the transition to clean transportation.
Congress Moves to End Reconnecting Communities and Related Grants
The House Transportation and Infrastructure Committee moved to rescind funding for the Neighborhood Equity and Access program, which funds highway removals, freeway caps, transit projects, pedestrian infrastructure, and more.
From Throughway to Public Space: Taking Back the American Street
How the Covid-19 pandemic taught us new ways to reclaim city streets from cars.
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