Colorado Could Be the Next State to Legalize the Idaho Stop

Colorado is the latest state to consider allowing people on bikes to pass through intersections more freely than cars.

1 minute read

January 29, 2017, 11:00 AM PST

By James Brasuell @CasualBrasuell


Bicycle traffic light in Berlin

Copenhagenize Design Co. / Copenhagenize

John Wenzel reports on a bill in the Colorado State Legislature that would legalize the "Idaho Stop."

Senate Bill 93, introduced Jan. 18 by Sen. Andy Kerr, D-Lakewood, would permit a person riding a bike or “electrical-assisted bicycle” to pass through intersections without stopping if the rider “slows to a reasonable speed, yields to vehicles and pedestrians, and can safely proceed or make a turn.”

Much of Wenzel's coverage is devoted to explaining the rationale behind the bill, citing precedent and studies supporting the case for legalizing the Idaho Stop.

The law is commonly referred to in the biking community as the “Idaho stop” and is credited with reducing cycling-related injuries by 14.5 percent the year after it was implemented, with no change in fatalities, according to a 2010 study by Jason Meggs, a researcher at the University of California at Berkeley School of Public Health.

As expected, there are politicians who oppose the bill, and there are bike advocates excited about the possibility of the bill's passage. Wentzel is careful to allow both sides to state their case. With the bill, Colorado joins a handful of other states, and the District of Columbia, to debate similar regulations in recent years. 

Thursday, January 26, 2017 in The Denver Post

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Wastewater pouring out from a pipe.

Alabama: Trump Terminates Settlements for Black Communities Harmed By Raw Sewage

Trump deemed the landmark civil rights agreement “illegal DEI and environmental justice policy.”

April 13, 2025 - Inside Climate News

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

April 16, 2025 - Diana Ionescu

Black and white photos of camp made up of small 'earthquake shacks' in Dolores Park in 1906 after the San Francisco earthquake.

The 120 Year Old Tiny Home Villages That Sheltered San Francisco’s Earthquake Refugees

More than a century ago, San Francisco mobilized to house thousands of residents displaced by the 1906 earthquake. Could their strategy offer a model for the present?

April 15, 2025 - Charles F. Bloszies

People walking up and down stairs in New York City subway station.

In Both Crashes and Crime, Public Transportation is Far Safer than Driving

Contrary to popular assumptions, public transportation has far lower crash and crime rates than automobile travel. For safer communities, improve and encourage transit travel.

April 18 - Scientific American

White public transit bus with bike on front bike rack in Nashville, Tennessee.

Report: Zoning Reforms Should Complement Nashville’s Ambitious Transit Plan

Without reform, restrictive zoning codes will limit the impact of the city’s planned transit expansion and could exclude some of the residents who depend on transit the most.

April 18 - Bloomberg CityLab

An engineer controlling a quality of water ,aerated activated sludge tank at a waste water treatment plant.

Judge Orders Release of Frozen IRA, IIJA Funding

The decision is a victory for environmental groups who charged that freezing funds for critical infrastructure and disaster response programs caused “real and irreparable harm” to communities.

April 18 - Smart Cities Dive