Improvement of Michigan climatic files in pavement ME design.
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Improvement of Michigan climatic files in pavement ME design.

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  • Creators:
  • Corporate Creators:
    Michigan Technological University
  • Subject/TRT Terms:
  • Publication/ Report Number:
    RC-1626
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Michigan
  • Corporate Publisher:
    Michigan. Dept. of Transportation
  • Abstract:
    Climatic inputs have a great influence on Mechanistic-Empirical design results of flexible

    and rigid pavements. Currently the state of Michigan has 24 climatic files embedded in Pavement ME

    Design (PMED), but several limitations have been identified. First, five of the climatic files cannot be

    directly utilized because of an entire month of missing data. These missing data should be filled properly.

    Second, the 24 weather stations in Michigan are not uniformly distributed geographically, with some

    regions poorly represented. It is desirable to add new weather stations for these gap regions. Third,

    existing climatic files for Michigan have not been updated since 2006. A longer climatic data length can

    better represent the long-term climatic conditions, so it is recommended that the data length of existing

    climatic files be extended. This study aims to improve the climatic files in Michigan for PMED. To

    achieve this goal, quantity and quality checks of the existing 24 climatic files were conducted to find out

    the potential missing data and erroneous data. Procedures for filling the missing data and correcting the

    erroneous data were proposed as well. The sensitivity of PMED design performance to weather station

    variation in Michigan, the five individual climatic variables, and the depth to ground water table was

    investigated. Two traffic levels (heavy and medium) and two pavement types (flexible and rigid) were

    used for the sensitivity analysis. Typical traffic load spectra, pavement structures and materials in

    Michigan were incorporated as well. Additional weather data from the Automated Surface Observation

    Systems (ASOS) and Michigan Road Weather Information System (RWIS) were investigated as

    potential sources to add new weather stations in gap regions and to extend the existing climatic files.

    Quantity and quality checks on both data sources were conducted to evaluate the feasibility of application

    in PMED. It was found the ASOS data and the existing climatic data are from the same historical data

    records. Fifteen additional weather stations were added to fill the gap regions using the ASOS data. In

    addition, all the existing climatic files have been extended from Feb. 2006 to Dec. 2014. Finally, climatic

    zones based on pavement design results and multiple climatic variables for Michigan were preliminarily

    investigated. Fifteen climate zones were established for Michigan based on pavement surface

    temperatures and distress predictions.

  • Format:
    PDF
  • Funding:
    2013-0067
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