Pavement Marking Materials and Markers: Real-World Relationship Between Retroreflectivity and Safety Over Time (2006) / Chapter Skim
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2 Executive Summary Background and Objectives Longitudinal pavement markings are found on nearly all freeways and highways in the United States, and previous research has emphasized the importance of quantifying the impact of different pavement marking material types on safety. While important, quantifying safety of pavement marking and marker of material types has remained elusive.
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From page 15... ...
3 Discussion of Results The study has produced retroreflectivity models for epoxy, methyl methacrylate, permanent tape, solvent, thermoplastic and waterborne paint for both white and yellow pavement markings. Retroreflectivity models for markers are a function of their type (snowplowable or nonsnowplowable)
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From page 16... ...
4 In conclusion What appears to be important is that markings are present and visible to drivers, but what is less important with respect to safety is whether the markings have high retroreflectivity or relatively low retroreflectivity. One hypothesis is that drivers compensate by reducing their speed under lower visibility conditions, and maintain higher speeds under higher visibility conditions.
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