FHWA is required by law to develop minimum retroreflectivity values for traffic signs and pavement markings, and to place them in the MUTCD. In response to FHWA's plans, AASHTO's Standing Committee on … [Read more...] about A Status Report on AASHTO’s Task Force on Retroreflectivity Guides
Retroreflectivity
Signs and Markings: New Requirements Coming
This article discusses the development of the minimum sign and marking retroreflectivity requirements by FHWA. … [Read more...] about Signs and Markings: New Requirements Coming
Laboratory-Accelerated Versus Outdoor Weathering for Retroreflective Sheeting Specifications
Laboratory-accelerated weathering tests are used instead of outdoor weathering tests in specifications for products intended for long-term outdoor use because they provide fast results. These … [Read more...] about Laboratory-Accelerated Versus Outdoor Weathering for Retroreflective Sheeting Specifications
Field Surveys of Pavement-Marking Retroreflectivity
The research reported in this paper is from work performed as part of a large effort by the FHWA to develop guidelines on the minimum retroreflectivity values for pavement markings. … [Read more...] about Field Surveys of Pavement-Marking Retroreflectivity
Presentation Handout: Field Surveys of Pavement Marking Retroreflectivity
The research reported in this presentation handout is from work performed as part of a large effort by the FHWA to develop guidelines on the minimum retroreflectivity values for pavement markings. … [Read more...] about Presentation Handout: Field Surveys of Pavement Marking Retroreflectivity
Sign Retro Reflectometers: How Do They Work?
This presentation introduces the instruments for measuring traffic sign retroreflectivity - what they are, how they work, and how they contribute to improved nighttime visibility of traffic signs. … [Read more...] about Sign Retro Reflectometers: How Do They Work?