Analysis of Performance Measures of UDOT's Traffic Incident Management Program: Phase 2

The Traffic Incident Management (TIM) study (Phase I) found that the Utah Department of Transportation (UDOT) and the Utah Highway Patrol (UHP) have the data necessary to conduct a study to evaluate incident management performance measures, with the exception of the time when all lanes become open again (T5) and capacity is restored. UHP maintains the Computer Aided Dispatch (CAD) that contains activities of both UHP officers and UDOT’s Incident Management Team (IMT) units at crash sites. UDOT maintains two traffic related datasets including the Performance Measurement System (PeMS), which collects data from sensors and Iteris Performance Measurement System (iPeMS) which collects data from probe vehicles, both of which help estimate the time of incident occurrence and clearance. UDOT’s Traffic Operation Center (TOC) maintains data that can be used for the analysis, but during the study, it was found that extracting the time of capacity recovery from this data was difficult. Instead, to accomplish the study objective, UHP officers were requested to collect T5 data from March to August 2018 manually as they assisted crash victims and IMT units in clearing congestion. This additional time data made the completion of the study possible. Using the data collected in the 6-month period, incident management performance measures were analyzed and extra user costs due to crashes were estimated under the current IMT program. It was found that decreasing even a few minutes in response time and roadway clearance time will result in a substantial decrease in user costs, thereby making the IMT program a worthwhile investment. While the Phase I study was underway, the Utah Legislature approved funding to expand the operation of its IMT program. The new funding allows UDOT to add 13 more IMT units. The Phase I study showed that reduction in response time will help UDOT reduce the delay and crash costs. The expanded IMT program, which began operation in the spring of 2019, provides an opportunity to validate the outcome of the Phase I study using field data. This Phase II study will collect a new set of performance data in spring and summer (March to August) 2020 when the expanded IMT program will have been well established. This Phase II study will help UDOT evaluate the IMT program expansion.


    • English


    • Status: Active
    • Funding: $75000
    • Contract Numbers:


    • Sponsor Organizations:

      Utah Department of Transportation

      4501 South 2700 West
      Project Development
      Salt Lake City, UT  United States  84114-8380
    • Managing Organizations:

      Utah Department of Transportation

      4501 South 2700 West
      Project Development
      Salt Lake City, UT  United States  84114-8380
    • Project Managers:

      Jensen, Travis

    • Performing Organizations:

      Brigham Young University

      Provo, UT  United States  84602-4081
    • Principal Investigators:

      Schultz, Grant

    • Start Date: 20191112
    • Expected Completion Date: 20210228
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01736067
    • Record Type: Research project
    • Source Agency: Utah Department of Transportation
    • Contract Numbers: 208507
    • Files: RIP, STATEDOT
    • Created Date: Apr 11 2020 7:11PM