Ground penetrating radar: State of the practice for pavement assessment

Imad L. Al-Qadi, Samer Lahouar

Research output: Contribution to specialist publicationArticle


Ground penetrating radar technology has been used to assess pavement performance and structure for the past 30 years. Nonetheless, after all this time, ground penetrating radar is not currently used on a routine basis by the Departments of Transportation in the US - mainly because of difficulties encountered during ground penetrating radar data interpretation. These difficulties are twofold: ground penetrating radar reflected signals depend largely on the a priori unknown dielectric properties of the pavement materials; and it is usually difficult to accurately locate the individual reflected pulses in the measured ground penetrating radar signals. Furthermore, ground penetrating radar is not an imaging technique such as X-ray; hence, it does not provide an "image" of the subsurface, but rather it presents a set of time domain signals that correspond to the collected scans. This paper presents several processing techniques that can be used to estimate the pavement layer thicknesses and to detect subsurface discontinuities uniquely from ground penetrating radar data.

Original languageEnglish (US)
Number of pages5
Specialist publicationMaterials Evaluation
StatePublished - Jul 2004
Externally publishedYes


  • Ground penetrating radar
  • Nondestructive testing
  • Pavement layer thickness estimation
  • Subsurface discontinuity detection

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


Dive into the research topics of 'Ground penetrating radar: State of the practice for pavement assessment'. Together they form a unique fingerprint.

Cite this