A COMPARISON OF FOUR ROUGHNESS MEASURING SYSTEMS, RESEARCH REPORT 32-10

FOUR DIFFERENT MEASURING DEVICES FOR USE IN EVALUATING HIGHWAY SURFACE ROUGHNESS WERE INVESTIGATED. TWO, THE CHLOE PROFILOMETER, AND THE BPR ROUGHOMETER, ARE WELL KNOWN AND HAVE BEEN COMPARED PREVIOUSLY. THE OTHERS, THE PCA ROADMETER AND THE MAYS ROAD METER ARE RECENT DEVELOPMENTS. THE AIMS OF THE STUDY WERE TO: (1) EXAMINE THE FIELD-WORTHINESS OF THE SEVERAL SYSTEMS, (2) DEVELOP A FEELING FOR THE VALIDITY AND UTILITY OF THEIR RESPECTIVE MEASUREMENTS, AND (3) DETERMINE THE EFFECTS ON THEIR RESULTS OF SUCH VARIABLES AS OPERATING SPEED, DRIVER CHARACTERISTICS, OPERATING TEMPERATURES, AND OTHER FACTORS. ALL FOUR DEVICES WERE COMPARED ON EACH OF 24 SELECTED REPRESENTATIVE IN-SERVICE TEST SECTIONS. FLEXIBLE, RIGID AND COMPOSITE PAVEMENTS WERE INCLUDED. THE PCA ROADMETER AND MAYS ROAD METER WERE FURTHER COMPARED ON 21 ADDITIONAL REPRESENTATIVE SECTIONS. SECTION LENGTHS ARE ABOUT 850 FEET. REPLICATE MEASUREMENTS WERE MADE ONE WEEK APART. A 14-MEMBER PANEL RATED EACH OF THE SECTIONS. IN GENERAL, THE EFFECTS OF VEHICLE OPERATOR, SPEED, AMBIENT TEMPERATURE AND PAVEMENT SURFACE TEXTURE WERE STUDIED. THE METHOD PRINCIPALLY USED TO RANK EACH DEVICE CONSISTS OF COMPARING THE VARIABILITY OF ITS MEASUREMENTS BETWEEN SETS WITH THE VARIABILITY OF ITS MEASUREMENTS WITHIN SETS. THE RATIO OF THESE MEASUREMENTS IS DESIGNATED THE F-RATIO. IT IS CONCLUDED THAT, WHILE THE CHLOE IS BEST WITH RESPECT TO F- RATIO, IT IS DESIRABLE TO CONSIDER NUMEROUS ADDITIONAL FACTORS, INCLUDING COST, SPEED OF OPERATION AND DATA REDUCTION. A COMPREHENSIVE TABLE SHOWING COMPARISONS OF THE FOUR DEVICES ON THE BASIS OF MANY FACTORS IS PRESENTED. /BPR/

  • Supplemental Notes:
    • Hpr-1(8), STATE 62-3, BPR 8
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  USA  76011

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  USA  20590
  • Authors:
    • Phillips, M B
    • Swift, G
  • Publication Date: 1968-8

Subject/Index Terms

Filing Info

  • Accession Number: 00206347
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS
  • Created Date: Nov 29 1994 12:00AM