PRACTICAL RESTRIPING METHODOLOGY TO MAINTAIN MINIMUM RETROREFLECTIVITY OF LONGITUDINAL PAVEMENT MARKINGS

摘要

The Federal Highway of Administration (FHWA) proposed changes in the 2009 Manual onUniform Traffic Control Devices (MUTCD) establishing minimum levels of retroreflectivity forlongitudinal pavement markings. Once these criteria become mandatory, it would beresponsibility of concerned agencies to maintain pavement markings at these levels. However, itis not practical to check if all the markings in a jurisdiction meet the criteria, which could raiseliability issues. FHWA also proposed that selection and adherence to a maintenancemethodology would enable an agency to comply with the standards. This study developed apractical restriping methodology to implement restriping activities of longitudinal pavementmarkings practically and cost-effectively at a section-level. The methodology includes roadwaysection sampling, assessment and management procedures based on minimum retroreflectivitycriteria and driver’s preview distance. Section assessment method (SAM) was developed forsampling and evaluating retroreflectivity of an individual section of road segment. Sectionmanagement method (SMM) was developed to find the centrality of location to performrestriping activity cost-effectively based on moment of inertia method (MOI). Both SAM andSMM were demonstrated in a step-by-step procedure using an example and a case study, basedon retroreflectivity data collected using mobile retroreflectivity unit (MRU) on FM 57, FisherCounty, Texas.