Reliability Analysis of Premium Pavement Design Features

Abstract

This study evaluates the special features of premium design guidelines—features not considered in the AASHO flexible and rigid pavement design procedures. The significance of these features—fifteen in all for four pavement types—were investigated by evaluating pavement performance and design reliability. The researchers used the VESYS III program to evaluate features of the flexible pavements and an algorithm developed in a companion paper for the other three types (composite, jointed plain concrete, and continuously reinforced concrete). This computer program, Reliability Analysis and Performance of Pavements I (RAPP‐I), employs Monte Carlo simulation techniques to treat all of the design variables probabilistically. The effectiveness of each feature is evaluated by comparing the performance or expected life and reliability of typical pavement sections with and without a premium feature. The features beneficial in virtually all the pavements include adequate drainage, a nonerodable base, or a monolithic/tied shoulder. The rational method of selecting bitumen grade appears promising in flexible and composite pavements. The joint spacing‐recommendation of premium design procedure contributes to the longevity of jointed plain concrete pavements, as does the use of dowel bars. The significance of quality control and quality assurance of concrete is clearly demonstrated in the study.