SYMPOSIA PAPER Published: 01 January 1994

Radar for Pavement Thickness Evaluation


Pavement layer thickness data required for network and project level pavement management is often not available due to the cost, time, and traffic disruption involved in taking cores. A non-destructive, non-contact method for thickness measurement is available and can be implemented from a survey vehicle moving at highway speed. The technology incorporates horn antenna radar equipment coupled with customized processing software. The reported work represents evaluations of the method on 46 different pavement sections located in 12 different states. The processed radar data has been correlated with results from over 300 cores, showing an expected accuracy of +/-7.5% (typically +/- 0.5 inches or 12.7 mm) for asphalt thickness. Results from borings and test pits show an expected accuracy of +/- 12% (+/- 1 inch or 25.4 mm) for base thickness. The radar data has also been successfully utilized to identify changes in pavement section.

Author Information

Maser, KR
INFRASENSE, Inc., Cambridge, MA
Scullion, T
Texas Transportation Institute, Texas A&M University, College Station, TX
Roddis, WMK
University of Kansas, Lawrence, KS
Fernando, E
Texas Transportation Institute, Texas A&M University, College Station, TX
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Developed by Committee: D04
Pages: 343–360
DOI: 10.1520/STP18158S
ISBN-EB: 978-0-8031-5267-0
ISBN-13: 978-0-8031-1865-2