Transportation agencies routinely travel their extensive roadway networks conducting subjective roadway assessments of traffic control devices both day and night. Retroreflectivity is a good tool for product testing but can provide false positives for traffic control devices based on the approach geometry. This research project developed an objective nighttime assessment method for traffic devices that could be tied back to a form of level of service. The project also correlated luminance data with level of service. Researchers recommend the use the precise and approximate measurement methods in conjunction with nighttime inspections and retroreflectivity measurements to assess the accuracy and repeatability versus time.
Prototype Mobile Luminance Measurement System and Level of Service for Evaluating Rural High-Speed Nighttime Delineation
2013
64 pages
Report
No indication
English
Road Transportation , Transportation Safety , Transportation , Transportation & Traffic Planning , Traffic control devices , Luminance , Delineation , High speed , Highway transportation , Level of service , Measurement , Mobile , Night visibility , Research project , Retroflectivity , Roads , Rural areas
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