Cracking...

See Pavement Condition/Integrity (below).

Crack-mapping can be performed using lasers/accelerometers, and/or profilometers (IRI).  High-resolution GPR (1.5 GHz ground-coupled and 1.0 GHz horn antennas) can be used as a screening tool to look for subsurface indications of cracking beneath pavements already showing early signs of distress-in order to locate regions where more in-depth testing should be performed.  However, these results are possible only if very high spatial sampling density (40 scans/meter using horn antenna to upwards of 100 scans/meter using the GC antenna) is used along each pass of the GPR antenna.

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