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

Young Professional

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 and Environmental 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 and Environmental Planner

Get top-rated, practical training for planners

Overlapping highways

The state-sanctioned urbicide of Austin

People don’t kill cities. Freeways do.

September 8, 2026 - Benjamin Schneider

The Hoover Dam blocking the Colorado River. The river's water level is noticeably low. The cliffs surrounding the blue water are brown and jagged.

US to reduce Colorado River water deliveries to Mexico

A new Colorado Treaty amendment reduces Mexico’s Colorado River water allocation by 250,000 acre feet.

September 11, 2026 - The Arizona Republic

Skyscrapers in Jersey City.

New Jersey’s second-largest city bans standalone data centers

Jersey City will continue to allow co-location facilities, such as those meant for research institutions that store their own data.

September 4, 2026 - The Cool Down

A New Jersey train approaches people waiting at the station.

Amtrak not solely to blame for New Jersey commuter rail's unreliability, report finds

A new study from the Garden State Initiative found that NJ Transit’s budget grew 20% across a 4 year period, but reliability declined significantly over the same period.

September 15 - Mass Transit

A tall, gray power plant billows smoke into a blue sky.

EPA erases limits on planet-warming pollution from power plants

Under Monday’s plan, power plants would still have some limits on how much mercury, arsenic and other contaminants they can emit.

September 15 - New York Times

A white RAPID bus. The lower half is light blue, and says RAPID in purple text. The bus is half visible, appearing from the left side of the image.

Phoenix announces new on-demand transit service, more frequent RAPID buses

Both new services will launch in October, and are part of Phoenix's Project Effective Access Solutions for Easing Congestion.

September 15 - KJZZ

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.