Modifications were made in the horizontal distance and vertical displacement sensing devices of a BPR-Type Roadometer to improve the capabilities of this device for measuring pavement segments as short as 100 feet in length, and to increase the operating speed. Test results show that the modified system can be operated at test speeds ranging to 50 mph, and strongly suggest that the limiting speed may be in excess of 60 mph. Preliminary tests indicate that the device is capable of measuring pavement segments as short as 100 feet with sufficient accuracy to obtain RI values that are meaningful and usable. Roughness measurements obtained at 30, 40, and 50 mph correlated very well with those obtained at 20 mph.

  • Supplemental Notes:
    • Study conducted in cooperation with the U.S. Department of Transportation, Federal Highway Administration.
  • Corporate Authors:

    Illinois Department of Transportation

    126 East Ash Street
    Springfield, IL  United States  62706

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • LaCroix, J E
    • Kubiak, E J
  • Publication Date: 1975-6

Media Info

  • Features: Figures; Tables;
  • Pagination: 32 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00129046
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: Physical Res. No. 13Intrm Rpt., FHWA-RD-76-S0427
  • Contract Numbers: IHR-74
  • Files: NTIS, TRIS, USDOT
  • Created Date: Mar 10 1976 12:00AM