Sign Retro Reflectometers: How Do They Work?
Abstract: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.
Publisher: Federal Highway Administration
Publication Date: 1999
Full Text URL: Link to URL
Publication Types: Presentations
Topics: Retroreflectivity; Traffic Control Devices; Traffic Signs
Publication Date: 1999
Full Text URL: Link to URL
Publication Types: Presentations
Topics: Retroreflectivity; Traffic Control Devices; Traffic Signs