Spotlight on Pavement Uniformity: Minnesota Department of Transportation Status and Next Steps With the Paver-Mounted Thermal Profiler
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Spotlight on Pavement Uniformity: Minnesota Department of Transportation Status and Next Steps With the Paver-Mounted Thermal Profiler

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  • Corporate Creators:
    United States. Department of Transportation. Federal Highway Administration
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FHWA-HIF-22-061
  • Resource Type:
    Brief
  • Geographical Coverage:
  • Corporate Publisher:
    United States. Department of Transportation. Federal Highway Administration
  • Abstract:
    The Minnesota Department of Transportation (MnDOT) is continuing to explore further adjustments to the use of and applications for the Paver-Mounted Thermal Profiler (PMTP), a tool that has been fully deployed into practice for MnDOT asphalt paving projects since 2018. The agency had studied the tool for several years and saw the PMTP’s benefits in assessing asphalt uniformity, an indicator of long-term pavement performance. PMTPs uses temperature sensors to continuously read surface temperatures of the newly placed asphalt mat immediately behind the trailing edge of the paver screed during placement operations. These readings can indicate temperature differentials, usually referred to as thermal segregation. This data can be converted into a visual representation of the temperatures on the roadway, such as maps or graphs. MnDOT is leading a national transportation pooled fund study to enhance Veta1, software that manages and standardizes data imported from the PMTP and other intelligent construction technologies to perform viewing, filtering, and analysis. Veta is funded by Transportation Pooled Fund Study TPF-5(354) and is free to download. The software is moving to a web-based platform, and Rebecca Embacher, MnDOT Advanced Materials and Technology Engineer, says that should make it easier for State construction staffers to look at data in real time while in the field.
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