Transition from manual to automatic rutting measurements : effect on pavement serviceability index values.

Details

• Creators:
  Bandini, Paola ; Pham, Hung V.
• Corporate Creators:
  New Mexico State University. Civil, Agricultural, and Geological Engineering Dept
• Corporate Contributors:
  New Mexico. Dept. of Transportation. Research Bureau ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Ruts (Pavements)
  • Measurement
  • Rutting of roads--Evaluation
• Publication/ Report Number:
  NM 08SAF-02
• Resource Type:
  Tech Report
• Geographical Coverage:
  New Mexico
• Corporate Publisher:
  New Mexico. Dept. of Transportation. Research Bureau
• Abstract:
  The Pavement Serviceability Index (pSn is used by New Mexico Department of Transportation ; (NMDOT) to express the serviceability level of a pavement section at the network level. The PSI ; is calculated with distress ratings (including rutting) and roughness data. Currently, rut depth ; data collected with two NMDOT-owned 3-point profilometers are not used as an input in the ; calculation of PSI values. The main goal of this project was to develop and recommend a ; procedure to substitute automated rut depth for rutting ratings from manual surveys. For planning ; and reporting purposes, it is important for NMDOT to maintain the consistency of the methods ; and data used to calculate PSI values and to docwnent any change implemented so that ; comparisons of current and past conditions and performance evaluations of the network can be ; made. The transition from using manual survey ratings to automated rut depth measurements ; should introduce the smallest possible difference in the calculated PSI values and the overall ; condition rating of the highway network. Three procedures or approaches are presented and ; discussed. Regression analyses were applied to the rut depth and PSI data. Recommended ; Approach A proposed preserving the current PSI formulation and factors and converting the ; automated rut depth data into equivalent rutting ratings. Alternative Approach B proposed minor ; modifications to the PSI formulation. A third approach (Approach C) was considered and ; evaluated, but was not recommended. Results of the statistical tests performed on the data and ; results are also presented. The ratings from manual surveys and automated rut depth data were ; compared with detailed measurements of transverse profiles to evaluate the data from these two ; methods. This report includes an implementation plan for the recommended and alternative ; approaches.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/18276/dot_18276_DS1.pdf
• File Type:
  [PDF - 52.11 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:22dead9d0ba64012140b6b9266ba91e42265a6de0eee2b1b4c69ce8255c6656b