When a 3-Foot Clearance for Passing a Cyclist Is Not Enough

Sharrows and 3-foot passing laws are meant to make biking safer in streets in the absence of bike lanes. Bike activists in Iowa want to take safety a step further by requiring motorists to move to another lane, just as they would if passing a car.

2 minute read

February 28, 2016, 5:00 AM PST

By Irvin Dawid


The bill, known as "Change Lanes to Pass Bicyclists" or Senate File (SF) 2224 "would require motor vehicles to use the opposite side of the road or an adjacent travel lane to pass people on bicycles," states the legislative page of the Iowa Bicycle Coalition "It also recognizes that paved shoulders and bike lanes are adjacent travel lanes, and prohibits motorists from steering unreasonable close to people riding bicycles in those lanes."

Current Iowa law "prohibits motorists from driving 'unreasonably close' to cyclists," writes Molly Montag of the Globe Gazette. Last year 26 states plus the District of Columbia passed laws requiring motorists to pass no less than three feet from a cyclist, according to the National Conference of State Legislatures. 

state map of passing statutes

Credit: NCSL, Safely Passing Bicyclists Chart, 12/17/2015

"Approximately half of Iowa cyclists killed in the past 10 years have been hit during passing incidents, said Iowa Bicycle Coalition Executive Director Mark Wyatt," writes Montag.

“We want the law very crystal clear that you pass a bicycle like you would pass any other vehicle on the roadway,” Wyatt said.

SF 2224 passed the Transportation Committee, 12-0 and the Senate, 38-12, and now advances to the House, according to Iowa Bicycle Coalition webpage. The Iowa Chapter of the Sierra Club is supporting the bill [PDF].

Another safety strategy is to add sharrows to the asphalt along with roadway signs indicating to both cyclists and motorists that the both are to share the lane. While better than no such signs, many question their effectiveness to improve safety and increase cycling.

Credit: Bike Arlington

Photo: sharrows








Readers can listen to a 49-minute talk with Mark Wyatt on bike culture in the Hawkeye State on Iowa Public Radio. The "Talk of Iowa" show was aired last September followed the tragic death of a cyclist by a drunk driver.

Hat tip to AASHTO Daily Transportation Update.

Tuesday, February 23, 2016 in Globe Gazette

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

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

October 28, 2026 - Zachary Whalen

A car drives through a puddle, making a large splash. Rain pours down.

California plans to bury El Niño’s downpour

If the state plays its cards right, it may be able to store a billion acre-feet of El Niño’s water in aquifers.

October 28, 2026 - Grist

Lake Powell with much of the water evaporated.

Desperate measures: Advocates weigh draining Lake Powell to fill Colorado River

Draining the reservoir could reduce evaporation losses by a couple hundred thousand acre-feet.

October 30, 2026 - Yale Environment 360

A Firefighter sprays water from a hose at a tall blaze.

US buildings threatened, destroyed by fires set to triple by 2060

Researchers found a high fire risk for socioeconomically vulnerable neighborhoods in the American West.

November 4 - Inside Climate News

People cross a crosswalk in Los Angeles.

LA residents may be allowed to paint their own crosswalks

Councilwoman Katy Yaroslavsky put out a motion instructing the Los Angeles Department of Public Transportation to study the feasibility of allowing volunteers to paint crosswalks.

November 4 - ABC7

Two women walking on the sidewalk in Dallas.

Dallas moves to overhaul its zoning code

The city's zoning reform will allow more multi-family and mixed-use developments.

November 4 - Yahoo News