Iowa DOT News

Iowa DOT begins traffic information collection in Northwest Iowa

AMES, Iowa - May 18, 2023 – Investing your tax dollars wisely to make lives better through transportation requires a great deal of data to inform the best possible decisions. Each year the Iowa Department of Transportation canvases a specific quadrant of the state to collect information on the number of cars, trucks, and other vehicles using the state, county, and city roadways. Using this data, we can better predict traffic volume and weight trends, allowing us to plan improvements that will give you the most benefit for each dollar spent.

This year's efforts are concentrated in Northwest Iowa, but occasionally crews will work elsewhere in the state. You may see employees in DOT-marked vehicles sitting at various locations counting the morning, noon, and evening traffic. They count and classify vehicles, record vehicle turning movements, and gather other data necessary to assist in planning the future of Iowa's roadway system.

Other employees will be placing and checking portable traffic recorders in the same general areas where you may notice a black rubber tube running across the road. When the recorders are set, they usually record data for one or two days and are checked periodically. Employees responsible for the recorders work various shifts, including hours outside of a traditional business day.

Additional statewide work scheduled for this summer includes the installation, upgrading, and maintenance of permanent traffic recorders and weigh-in-motion equipment at continuous count station locations.

While this work is going on, you can expect to see Iowa DOT employees and vehicles in your communities all hours of the day. All of this work is critical to the future of the state's transportation system.


Contact: Mark Hansen at 515-239-1990 or [email protected]


©  Iowa Department of Transportation.  All rights reserved.