Effect of Geometrical Anisotropy on Road Surface Radar Cross Sections

Abstract

A new modification to a method to determine the normalised radar cross section of road surfaces is proposed, so that the radar cross section of anisotropic pavement materials can also be considered. This method is applied to two types of brick pavements with different bond patterns under two different azimuth angles, both in wet and dry conditions. It is demonstrated that the radar cross section of anisotropic road surfaces can vary significantly as function on the azimuthal observation angle, and that it is dependent on the bond pattern of the pavement.