Publisher's Synopsis
The objective of this synthesis study was to provide examples of effective and advantageous practices that illustrate how different types of agencies can meet the retroreflectivity requirements. The aim of this study was to document the state of the practice and identify content that will assist other agencies that are exploring different methods for maintaining sign retroreflectivity. Information for this synthesis study was gathered from three distinct sources: published research, existing guidance and policy, and telephone surveys. The telephone surveys comprised the majority of the information in this report. The goal of the surveys was to identify what methods have been implemented and which have shown the most promise. The survey included 14 main questions and was designed to facilitate an open-ended conversation about sign retroreflectivity and general maintenance practices. Survey participants were public agencies with active p
