Mobility - Reliability - WisDOT MAPSS Performance Improvement Program

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

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

This measure tracks the consistency of traffic patterns throughout the state. The Planning Time Index shows the disparity in travel times when drivers experience much longer travel times than expected. A decreasing planning time index means delay has been reduced from what it has been on those travel days with delay. 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 travel time reliability goal is to improve reliability from the prior year’s performance result (a lower number is better).

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

Travelers expect to arrive safely and on time at their destination. Planning Time Index (PTI) expresses the predictability of on-time arrival in a mathematical term that helps travelers more precisely budget travel time and transportation planners better measure system performance.

Travel reliability measures variability of congestion. A wide variation in the recorded travel time indicates low reliability and a high planning time index. Traffic incidents, weather conditions, special events, holiday travel, sporadic demands and work zones are all dynamic components of traffic congestion that may adversely affect travel time reliability. Reducing or mitigating the impact of these factors makes travel time more reliable.

Wisconsin continually looks to enhance reliability through their annual improvement program. During 2022, the department expanded the system to include live camera streams and improved winter road condition reporting. The live camera streams allow users to monitor live traffic and traffic incidents throughout the state in real time. The improved winter road condition reporting provides more accurate road conditions throughout the state which is particularly important during snow and ice events. In addition, the department continues to develop their Work Zone Data Exchange with the intent of making travel on public roads safer and more efficient through access to data on work zone activity. The department strives to implement technology in improve safety, accessibility, and reliability on the state’s transportation network.