Any Pavement Application
SurPRO 4000, at the May 2013 FHWA-sponsored testing on several pavements at the MnRoad facility in Minnesota, proved it was in a class of its own. It had much higher accuracy cross correlation than any other commercially available profiler on all six pavements. It even outperformed the Benchmark Device.
Types of Pavement Tested at the May 2013 FHWA Rodeo:
  • Dense Graded AC
  • 12.5mm SMA
  • Chip Seal
  • Transverse Tining
  • Diamond Grinding
  • Longitudinal Tining
Recap of the May 2013 FHWA Rodeo Test Results:
  • Mean repeatability cross correlation for all six sections (IRI, long & medium filter) was 99.4%
  • Individual cross correlations of up to 99.9%
  • Accuracy cross correlation to Benchmark Device was very good, the best of any commercial profiler.
  • SurPRO was insensitive to operator bias such as acceleration and transverse tilting motion
  • Up to 99.5% repeatability using different operators
  • Note: solar heating caused unusually large movement of pavements affecting profile results and necessitating data adjustments.
So how does SurPRO 4000 achieve these great results on such a wide range of textures, some of which drive laser profilers to distraction? Without giving away SurPRO secrets we can say it's a combination of tire durometer rating and profile, profiler geometry and inertial stabilizer.