The Iowa Department of Transportation announced on April 22 the deployment of new automated detection and messaging systems to alert drivers about slow-moving vehicles on the Iowa 5 / U.S. 65 bypass in the Des Moines metro area.
According to the department, this project is a partnership with the Des Moines Area Metropolitan Planning Organization and aims to improve safety by providing real-time information to drivers when slow-moving vehicles are present on this high-speed freeway. The Iowa 5 / U.S. 65 bypass is a four-lane roadway with speed limits up to 65 mph, connecting Interstate 80 and Interstate 35 around Des Moines. Despite these speeds, farm equipment and other slow vehicles are permitted on certain sections, particularly where it serves as the only crossing of the Des Moines River for agricultural purposes. Some farm vehicles may travel as slowly as 14 mph.
The system uses roadside sensors and other real-time detection feeds to identify slow-moving vehicles. When detected, information is relayed to flashing beacons and Dynamic Message Signs temporarily installed along selected locations of the bypass. These alerts notify drivers that a slow-moving vehicle is ahead so they can reduce speed or change lanes safely. The department also reports working with equipment manufacturers in a pilot program that uses telematic data from DOT-owned vehicles such as roadway mowers to help trigger notifications.
Statewide real-time traveler information remains available through Iowa’s 511 system via website, phone line, social media channels, or mobile app.
More details about this initiative can be found in the organization’s press release.
