The purpose of surface regularity test is to measure the riding quality of pavements and the

same requirement and standard is applied to both concrete and bituminous carriageway. On

the other hand, sand patch test is used for checking the skid resistance of road pavements.

Moreover, it is related to traffic noise because the intensity of noise generated from road

traffic is related to texture depth of carriageway.

Thanks Abbas AbdulMajeed Allawi