During the conduct of the Strategic Highway Research Programs(SHRP) on highway operations, flexible and rigid pavement preventivemaintenance treatments were placed on pavements in the UnitedStates and Canada. The placement and performance monitoring ofthese Specific Pavement Studies (SPS-3 and SPS-4) has been conductedunder the SHRP and Federal Highway Administration (FHWA) LongTerm Pavement Performance Program (LTPP). Field performance reviewsof the preventive maintenance treatments have also been conductedby Expert Task Groups (ETG) organized by the Pavement Divisionof the FHWA.

This report summarizes the results of the ETG performance surveysconducted after 5 years of service and the results of the preliminaryanalysis of LTPP Database data for the SPS-3 experiment.