Mobility - Delay - WisDOT MAPSS Performance Improvement Program

WisDOT MAPSS - Mobility - Delay - Delivering transportation choices that result in efficient trips and no unexpected delays.

Delay - Delivering transportation choices that result in efficient trips and no unexpected delays.

This is a measure of highway congestion that estimates the additional time travelers needed to reach their destinations when traffic is moving slower than free-flow conditions. The department tracks this number to better understand traffic patterns and capacity challenges that may be unique to certain areas. The numbers are not comparable to MAPSS results published prior to 2018, as the federal performance data source, used for this measure, was revised in 2017. The goal is to reduce hours of delay from the prior year’s performance result (a lower number is better).

To view more detailed information visit: Performance Map and Statewide Corridor List.

A smooth flow of traffic creates positive impacts for our economy, environment and quality of life. Conversely, traffic jams and congestion can waste fuel and compromise air quality. Highway congestion occurs when traffic demand exceeds available capacity. There are two categories: recurring congestion (where delays and traffic jams happen with regularity) and unexpected congestion (crashes, bad weather). A focus on vehicle delay helps the department gain insight into highway capacity needs to better serve the traveling public.

Vehicle delay is comprised of recurrent and non-recurrent delay. Recurrent delay is caused by normal fluctuations in traffic demand such as morning and evening commuter traffic. Non-recurrent delay differs by seasons and areas of the state. Factors include: traffic surges from holidays and special events; weather related delays and incidents; and work zone impacts such as road closures, lane restrictions and traffic detours.

Throughout 2022 the Wisconsin Department of Transportation (WisDOT) made improvements to the transportation system. Construction was completed on the part-time shoulder lane on US 12/18 between I-39/90 and Whitney Way in Dane County resulting in decreased congestion and delay reduction. Other projects completed in 2022 include the Trego Interchange located in the Northwest Region and the I-43/I-94 resurfacing in the Southeast Region. WisDOT is planning multiple statewide projects to address deteriorating roadway conditions and improve safety.