Skip to Content
Streetsblog New York City home
Streetsblog New York City home
Log In
Bicycling

Here’s Why Mixing Zones Scare People on Bikes So Much

Along protected bike lanes, mixing zones are NYC DOT's preferred design treatment at intersections where drivers can turn across the bikeway. Drivers are supposed to slow down and let passing cyclists proceed, but if the person behind the wheel is careless or impatient, the design doesn't offer much in the way of protection -- just ask Jonathan Warner.

Warner was approaching Fourth Street in the Second Avenue bike lane yesterday when a driver veered into him across the mixing zone:

https://twitter.com/Jaxbot/status/967893349553319936

Mixing zones begin far ahead of the intersection in order to give motorists and cyclists a clear view of one another, but they often don't function the way they're intended. In Warner's case, an illegally-parked construction vehicle obstructed the view of the approaching driver, who then veered into the path without yielding.

Intersections with mixing zones have a higher rate of cyclist injuries than those where cyclists and turning drivers each have a separate signal phase, and last year, a turning box truck driver killed Kelly Hurley in the mixing zone on First Avenue and Ninth Street.

DOT has taken some halting steps toward upgrading its bike lane intersection designs. The agency has piloted this design at a handful of Manhattan intersections:

70-and-columbus
DOT's first offset crossing on Columbus and West 70th Street.

While projects like the upcoming redesign of Fourth Avenue call for similar treatments, DOT has hesitated to make this design standard.

So far, the agency has no plans to retrofit most Manhattan intersections with the design above. And last month, DOT Bicycle Program Director Ted Wright defended the inclusion of mixing zones in the agency's plan for crosstown protected lanes, arguing that they would be safer on relatively low-speed side streets than on avenues.

On Twitter yesterday, Warner said even at lower speeds, mixing zones pose problems.

When crosstown protected bike lanes were presented to CB4, we told @NYC_DOT that mixing zones would be a problem. They said speeds are low, not an issue. The problem, as you can see, is not speeds of the cars, but the fact someone hooks into your path without warning.

— Jonathan Warner (@Jaxbot) February 25, 2018

DOT has said it will release full results of its study of bicycle intersection designs sometime this spring.

Stay in touch

Sign up for our free newsletter

More from Streetsblog New York City

State DOT Partially Backs Off Cross Bronx Expwy. Expansion

Advocates are still concerned about a project that will widen five bridges and create a temporary roadway.

September 2, 2025

Instacart Now Claims it ‘Supports’ Worker Minimum Wage That It Fought To Defeat; Experts See ‘Corporate Spin’

After an all-out campaign against a minimum wage for its workers, Instacart now claims it "supports" the bill. But that's just "a flat-out lie," said one worker advocate.

September 2, 2025

Tuesday’s Headlines: Jerry, We Hardly Knew Ye Edition

Finally, an honorable pol makes the choice to retire before everyone grows to hate him. Plus other news.

September 2, 2025

Monday’s Headlines: Closed for Labor Day Edition

It's time for the best parade of the year. Plus the weekend's news (so far).

September 1, 2025

SEE IT: Cops Violently Arrest Teen Riding Citi Bike in Alphabet City

Three cops slammed a teenager to the ground, pulled his hair and knelt on his head — for allegedly riding a Citi Bike "in a reckless manner."

August 29, 2025

‘Pedestrianize’ the Financial District, Lower Manhattan Council Member Says

Downtown Council Member Chris Marte says the city refuses to launch a $500K downtown pedestrianization study funded by his predecessor.

August 29, 2025
See all posts