Guidelines to utilize the research findings from the AASHO road test at Ottawa, Illinois, are presented. The guidelines present a method of studying the interrelationships of performance variables and design variables of selected pavement sections so that comparisons may be made. 3 types of design variables are discussed: the structural variable which describes the strength characteristics of pavement layers, the load variable reported in terms of accumulated axle loads, and the climatic or regional variable which describes external influences.

Issues for 1963- include section: Urban transportation research digest.

The feasibility is investigated of various acoustic (sonic), nuclear, and electrical techniques for nondestructive measurement of Portland cement and bituminous concrete pavement thickness both during and after construction. Recommendations are made for equipment development and field testing of three specific methods that could potentially result in such measurements with the desired degree of speed and accuracy.