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.
Continued improvement in this area grows from a diversified approach including informational tools, quality services and infrastructure enhancements. For example, WisDOT's 511WI.gov service saw significant growth in 2023, with 21% increases each in website visits and phone calls over 2022. Furthermore, new freeway message signs were installed along I-41 in Washington County to provide drivers with important information along this heavily used corridor. Looking forward, in 2024, WisDOT's Freeway Service Team will assist drivers to reduce the impact of disabled vehicles and accidents in work zones across seven counties: Milwaukee, Ozaukee, Dane, Outagamie, Brown, Juneau and Columbia. Additionally, improvements to add lanes and increase safety through the I-94 East-West Corridor in Milwaukee County is an example of a project poised to create positive impacts for smoother daily commutes.