A HIGH SPEED PROFILING DEVICE. FINAL REPORT

A profiling device (profilometer) capable of measuring pavement profiles at freeway traffic speeds was developed. This device can be used either to supplement or to replace the Response Type Road Roughness Meters (RTRRMs) that are typically part of a pavement management system. Since profilometers determine road roughness by measuring the pavement profile directly, they are not subject to the same stringent calibration requirements as RTRRMs. In addition, a profilometer's measurements are collected independent of vehicle speed, while an RTRRM is only accurate at the speeds for which it is calibrated. The profilometer in this project uses laser height sensors to measure the distance from the vehicle to the pavement, while some other profilometers use ultrasonic sensors or broadband light sensors. Data from these laser sensors are collected by a VMEbus computer running MS-DOS. Software written in the C programming language reduces and processes the collected data into a pavement profile and an International Roughness Index (IRI) value. Additional navigation sensors provide vehicle location information during data acquisition.

Language

  • English

Media Info

  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 219 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00720133
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/CA/TL-95-05, Rept No. 631155
  • Contract Numbers: F90TL14
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Apr 11 1996 12:00AM