THE ROLE OF THE PARKHILOVSKII MODEL IN ROAD DESCRIPTION

Models of road surfaces to be used as a basis for vehicle response determination must - at least implicitly - define both direct and cross spectral densities for the profiles of pairs of parallel tracks. The model proposed by Parkhilovskii is here compared with that based on isotropy. It is shown that, despite apparent shortcomings, the Parkhilovskii model is fully compatible with the isotropy model for profile-pair description, and that the two may helpfully be used together in describing a road surface.(a) /TRRL/