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This report from the second Strategic Highway Research Program (SHRP 2), which is administered by the Transportation Research Board of the National Academies, focuses on improving the ability of highway agencies to design and construct long-lasting highway projects with minimal disruption to the traveling public.
Fatigue cracking and reflection cracking criteria were developed and incorporated into a design procedure for flexible and rigid overlays of rigid pavements. Linear elastic layered theory is the basic model used to compute stresses and strains in the pavement system, which are then input to the fatigue and reflection cracking models. The fatigue criteria developments resulted from analyses of the performance of rigid pavements at the AASHO Road Test.
Fatigue and rutting criteria were developed and incorporated into a design procedure for flexible overlays of flexible pavements. The AASHO Road Test flexible pavement sections were used as a data base. Vol. 1 contains a summary of the overlay design procedure as well as a comparison with existing procedures. Vol. 2 is a user's manual for thickness design of flexible overlays for flexible pavements.