Ingersoll redesign slows traffic, cuts crashes
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Ingersoll Avenue has experienced a drop in crashes and injuries since its streetscape overhaul, according to a city presentation at Des Moines' Transportation Safety Committee meeting last month.
Why it matters: The redesign, including narrower lanes, bike paths and medians, was meant to slow drivers down, and the latest data suggests it's working.
State of play: The Ingersoll redesign began in 2020 at MLK Jr. Parkway and now stretches to 31st Street.
- The project aimed to upgrade utilities, reduce traffic speed and improve safety for both drivers and pedestrians.
- Changes included protected bike lanes, wider sidewalks, added medians, improved crosswalks and more greenery along the corridor.
By the numbers: Before the streetscape project, Ingersoll Avenue was reduced from four to three lanes. During that time, average speeds dropped from 24 mph (2006–2009) to 23 mph (2015–2019). Average annual crashes during those time periods fell from 51 to 15.
- In 2024 — after a large portion of the project was completed — average speeds dropped further to 20 mph, with only 12 crashes reported, according to the city's draft report.
What they're saying: Though some drivers may dislike the slower pace, that discomfort may be key to its success, says Alec Davis of Momentum DSM, which advocates for safer street designs.
- "If you're on Ingersoll, it's because you are going somewhere on Ingersoll," Davis says, noting the road is meant for people visiting local businesses or neighborhoods.
Yes, but: Long-standing infrastructure still poses challenges, including driveways that add conflict points between drivers, pedestrians and cyclists, Davis says.
- Some businesses have agreed to eliminate driveways, including Star Lofts and The Artessa at 31st Street. That also helps make room for more parking, a frequent critique of the street.
What's next: No construction is planned this year. The next phase, between 31st and 35th streets, is expected to begin next year.