AN INTEGRATED SYSTEM FOR THE EVALUATION OF ROAD PAVEMENTS. SIXTH INTERNATIONAL CONFERENCE, STRUCTURAL DESIGN OF ASPHALT PAVEMENTS, VOLUME I, PROCEEDINGS, UNIVERSITY OF MICHIGAN, JULY 13-17, 1987, ANN ARBOR, MICHIGAN

A high-speed road monitor (HRM) for surveying the surface condition and alignment of roads at traffic speed is described. This new computer-controlled equipment uses laser and inclinometer sensors to survey up to 200 lane kilometres per day of longitudinal profile, rutting, macrotexture, crossfall, gradient and horizontal curvature; usually it does this without interference to other traffic using the road. The development of a comprehensive computer-based system for processing the survey data to provide data summaries, exception reports and trend analysis is described. Levels of unevenness, and of change in unevenness are proposed for use in assessing aspects of road serviceability including structural adequacy. The survey equipment provides a rapid and economic method of locating damaged sections of pavement so that more detailed and costly inspection and deflection surveys can be more efficiently deployed. Sometimes a regulating course may be all that is required to restore surface profile. A method of estimating the material required to restore a deformed surface is presented. Measurement of deflection under a rollng wheel is firmly established in the United Kingdom as the basis for assessing structural condition and designing strengthening. An automated analysis system for deflection masurements is described that can assist in establishing priorities and designing cost-effective strengthening. The analysis system embodies empirical performance relationships derived from observations on pavements ranging from undesigned paved roads to pavements designed to carry traffic in excess of 100 million standard axles. An example is presented of a least-cost strengthening design provided by the system of analysis.

• Corporate Authors:

  University of Michigan, Ann Arbor

  Department of Civil Engineering
  Ann Arbor, MI  United States  48109
• Authors:
  • Jordan, P G
  • FERNE, B W
  • COOPER, DRC
• Publication Date: 1987

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 607-617
• Serial:
  • Publication of: Michigan University, Ann Arbor
  • Publisher: University of Michigan, Ann Arbor

Subject/Index Terms

• TRT Terms: Asphalt pavements; Condition surveys; Conferences; Deflection; Equipment; Evaluation; Information processing; Lasers; Pavement performance; Pavements; Ratings; Sensors; Serviceability; Smoothness; Strategic planning; Strength of materials; Structural analysis; Structural strengthening
• Uncontrolled Terms: Pavement conditions; Structural adequacy
• Old TRIS Terms: Pavement deflection
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00485628
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 31 1989 12:00AM