Normally radar measurements on both driving directions are performed, in addition also cross profiles can be made. The survey gives a continuous profile of various pavement layers. The number of boreholes that are necessary for adequate interpretation of radar profiles and for establishing the cross section of the road, are determined based on the radar profiles. Such combined method (ground penetrating radar and boreholes) gives a considerably better picture about the road geology than traditional surveys that are based only on boreholes.
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