PAVEMENT ROUGHNESS: MEASUREMENT AND EVALUATION

VERTICAL ACCELERATIONS OF A PASSENGER IN AN AUTOMOBILE ARE AUTOMATICALLY COUNTED WHILE TRAVELING A SECTION OF ROAD AT 51.5 MPH. A ROUGHNESS INDEX IS OBTAINED BY SUMMING THE ACCELERATIONS AND DIVIDING BY THE TIME ELAPSED DURING THE TEST. THE INDEX IS SUBJECTIVELY RELATED TO THE RIDING QUALITY OF PAVEMENTS. SINCE 1957, CONTINUITY IN MEASUREMENTS HAVE BEEN PRESERVED BY CORRELATING VEHICLES INVOLVED AND REFERENCE PAVEMENTS. THE RATE OF DETERIORATION IN RIDE QUALITY WAS FOUND TO BE DIFFERENT FOR EACH PAVEMENT TYPE AND VARIED ACCORDING TO THE ORIGINAL OR THE CONSTRUCTED ROUGHNESS OF THE PAVEMENT, STRUCTURAL NUMBER, AND THE TYPE OF HIGHWAY FACILITY INVOLVED. THE CORRELATION BETWEEN ROUGHNESS INDEX AND SERVICE AGE, CUMULATIVE TRAFFIC AND EAL'S YIELDED EQUALLY VALID STATISTICAL RESULTS. THE CONTRIBUTION OF TRAFFIC AND LOADING TO ROUGHNESS COULD NOT BE PROPERLY ASCERTAINED. EACH OF THE PARAMETERS WERE TIME DEPENDENT AND WERE CORRELATED WITH EACH OTHER. PAVEMENTS INVOLVING HIGH-TYPE CONSTRUCTION GENERALLY DO NOT EXHIBIT RAPID CHANGES IN RIDE QUALITY. LEVEL OF SERVICE PROVIDED BY THESE HIGHWAYS IN REGARD TO RIDE QUALITY, THEREFORE, ARE RELATED TO THE CONSTRUCTED ROUGHNESS OF THE PAVEMENT. /FHWA/

Media Info

  • Pagination: 104 p.
  • Serial:
    • Issue Number: 316

Subject/Index Terms

Filing Info

  • Accession Number: 00206485
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Apr 8 1973 12:00AM