Roundabouts

Roundabout in Friday Harbor, Washington.

Washington state has quietly built over 600 roundabouts

Nationwide data shows that roundabouts reduce injuries in crashes by 72%.

July 9, 2026 - The Seattle Times

Roundabout with green space and statue in middle nedt to dense cluser of mid-rise housing in Carmel, Indiana.

America's 'roundabout city' is in … Indiana?

Carmel, Indiana has built over 150 roundabouts as part of a broader mobility and development strategy.

June 10, 2026 - CNU Public Square

Roundabout with red mulch in middle in Sedona, Arizona with red truck driving through.

Study: Roundabouts are Primarily in Wealthier Neighborhoods

A North Carolina study sheds light on inequities in road safety interventions.

March 1, 2026 - Streetsblog USA

Rendering of Park Street in Jacksonville, Florida with new sidewalks and roundabout.

Jacksonville Completes Park Street Road Diet

The half-mile corridor now features new bike lanes and sidewalks, as well as roundabouts and new landscaping.

July 27, 2025 - News 4 Jax

Small oundabout with plants on neighborhood street.

Chicago Has Quietly Built Hundreds of Neighborhood Traffic Circles

Thanks largely to one alderperson’s efforts, the city has made mini-roundabouts a key piece of its road safety strategy.

July 17, 2025 - WBEZ

Rendering of Penrose Roundabout in Philadelphia, Pennsylvania.

Philadelphia Is Expanding its Network of Roundabouts

Roundabouts are widely shown to decrease traffic speed, reduce congestion, and improve efficiency.

April 27, 2025 - WHYY

Mini roundabout with landscaping in Las Vegas, Nevada.

Las Vegas Uses ‘Mini-Roundabout’ for Traffic Calming

Roundabouts, commonly used in other countries, are starting to catch on in U.S. cities. They can improve traffic flow and bring efficiency benefits.

January 29, 2025 - KSNV

Bird's eye view of roundabout with two lanes and four branches.

How I Learned to Stop Worrying and Love the Roundabout

What drives the U.S. backlash to roundabouts — objectively safer and more efficient than stop-and-go intersections?

January 8, 2025 - Bloomberg CityLab

Workers in safety vests installing a black modular roundabout ringed with yellow.

‘Modular Roundabouts’ Offer Quick-Build Traffic Safety Solution

The prefabricated roundabouts can be installed more quickly and at a much lower cost than traditional concrete traffic circles.

October 9, 2024 - Equipment World

Group of people and kids biking through small roundabout in Long Beach, California.

Long Beach Has Installed Nearly 100 Traffic Circles

They range from large traffic circles that reduce congestion to small neighborhood roundabouts designed to slow local traffic.

July 16, 2024 - Streetsblog LA

Cyclist with dog passing through a small neighborhood traffic circle in Denver, Colorado.

Denver Could Put Pause on New Traffic Circles

The city’s fire department has asked for a moratorium on new traffic circles, installed as a traffic calming mechanism.

October 3, 2023 - The Denver Gazette

Roundabout

The ‘Quiet Roundabout Revolution’ Sweeping U.S. Cities

Roundabouts, which can dramatically improve traffic safety, have been slowly proliferating across U.S. cities over the last two decades.

December 5, 2022 - The Washington Post

Interstate 5 in Shoreline, WA

Shoreline Plans for Road Expansion

Added traffic lanes, new roundabouts, and limited bike facilities are coming to N 145th Street.

March 14, 2022 - The Seattle Medium

Indiana

Bike-Friendly City in Indiana is Known for Plentiful Roundabouts

Indiana's fifth-largest city, of just under 100,000, residents has 120 roundabouts, more than any city in the U.S., and only 14 traffic lights. The average traffic fatality rate is 83 percent lower than the national average.

February 2, 2020 - Smart Cities Dive

Roundabout

Friday Funny: Circular Logic in a Roundabout

Satirical website The Onion has noticed something about the American approach to the traffic circle.

August 3, 2018 - The Onion

Roundabout

The Case for Modern Roundabouts: Increased Safety

Roundabout are gaining popularity in California and across the nation. While they have been shown to reduce crashes, not all are sold on the innovative concept, and when it comes to multi-lane roundabouts, cyclists have legitimate concerns.

June 7, 2016 - Napa Valley Register

Google Celebrates the Birth of the Traffic Light

If you opened Google to do a search on Wednesday, you'd see an image (the "doodle") of a traffic light and six Model-T era cars spelling out the company's name. It was honoring the 101-year anniversary of the birth of the electric traffic light.

August 7, 2015 - Time

Arpingstone

First Roundabout Comes to New York City

Roundabouts, not to be confused with traffic circles, are becoming popular throughout the United States. The Bronx will get the first one in NYC. The insurance industry and FHWA consider them far safer than traffic lights and stop signs.

August 3, 2015 - The New York Times - Wheels

Philadelphia Skyline

Pennsylvania Comes 'Round To Roundabouts

When two roads meet in William Penn's Forest, what do you do? New plans from the Pennsylvania Department of Transportation say, increasingly, you build a roundabout. No fewer than forty are on the drawing board throughout the state.

February 5, 2015 - Philadelphia Magazine

Orlando Street

Nation's Most Dangerous City for Pedestrians Becoming Safer

A Smart Growth America report put the spotlight on Orlando and the entire state of Florida as leading the nation in pedestrian deaths per capita. NPR investigate what is being done to lose the infamous title.

June 16, 2014 - NPR

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.

Senior Planner

City of Thousand Oaks

Community Development Director

City of Wisconsin Rapids

Professor of Urban Planning

Harvard University Graduate School of Design

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