Chicago Left Turn Traffic Calming Reduces Crashes

The city installed reflective posts and speed bumps at dangerous intersections to induce drivers to take left turns more slowly and carefully.

Read Time: 1 minute

January 24, 2023, 7:00 AM PST

By Diana Ionescu @aworkoffiction


Crosswalk in Chicago with newly installed yellow delineators and speed bumps

City of Chicago / Left turn traffic calming

A traffic calming element installed at 18 Chicago intersections is successfully slowing left turns, reducing the risk of collisions with pedestrians, reports Monica Eng in Axios. The project is part of the city’s efforts to reach its Vision Zero goals and eliminate pedestrian deaths. 

According to Eng, “Left turns were involved in 40% of crashes that led to serious injury or death from 2017 to 2021, according to city data.” David Smith, the city’s Complete Streets director, says data from a pilot program shows a 25 percent reduction in crashes at intersections where the change was made.

Some residents expressed frustration with the new infrastructure, inadvertently proving the device’s efficacy: “All they have done is further slow traffic,” one NextDoor commenter complained. Which is, after all, the point. “If you hit a speed bump or the rubber posts, you've driven in the wrong place.”

Friday, January 20, 2023 in Axios

Chicago Commute

The Right to Mobility

As we consider how to decarbonize transportation, preserving mobility, especially for lower- and middle-income people, must be a priority.

January 26, 2023 - Angie Schmitt

Sharrow bike markings on black asphalt two-lane road with snowy trees

Early Sharrow Booster: ‘I Was Wrong’

The lane marking was meant to raise awareness and instill shared respect among drivers and cyclists. But their inefficiency has led supporters to denounce sharrows, pushing instead for more robust bike infrastructure that truly protects riders.

January 26, 2023 - Streetsblog USA

View of stone-paved street with pedestrians and "Farmers Market" neon sign on left and old buildings on right in Seattle, Washington

Push and Pull: The Link Between Walkability and Affordability

The increased demand for walkable urban spaces could make them more and more exclusionary if cities don’t pursue policies to limit displacement and boost affordability.

January 27, 2023 - Smart Cities Dive

Protesters with signs in Atlanta after Tyre Nichols murder

Memphis: Crime-fighting Camera Sheds Light on Police Abuse

The irony is unmistakable. Public surveillance cameras, long controversial in the criminal justice community, provided pivotal video footage of the beating of motorist Tyre Nichols by five Memphis police officers at a traffic stop on January 7.

31 minutes ago - The New York Times

Photo of cars on two-way separated highway with illustrated lines between them indicating tech-driven decisions

How Autonomous Cars Could Impact Energy Use

The complex algorithms used by self-driving vehicle technology use massive amounts of energy, which could lead to a steep rise in carbon emissions as autonomous cars become more commonplace.

1 hour ago - Dezeen

Overhead view of crosswalk with pedestrian median

Safe Streets Grants Announced

The federal Safe Streets and Roads for All program funds planning and implementation for road safety projects aimed at reducing traffic deaths and building safe infrastructure for pedestrians, cyclists, and other vulnerable road users.

2 hours ago - U.S. Department Of Transportation