Performance Criteria for Retroreflective Pavement Markers (2022) / Chapter Skim
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1 Introduction Pavement markings are the most common traffic control device (TCD) used to communicate roadway information to drivers.
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2 Performance Criteria for Retroreflective Pavement Markers Study Methodology The objective of this research was to isolate and identify the effects of RPMs from a cohesive, three-pronged investigation of driver visibility, behavior, and safety. This was accomplished by developing a series of closed-course experiments, analyzing naturalistic driving data, and conducting an extensive review of the existing safety literature (after deeming a safety analysis not feasible due to lack of quality data)
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Summary 3 maximum brake application, speed differential in curve, lateral position change, and centerline encroachments. As part of the recognition and visibility study, researchers explored using a visibility model to quantify the visibility level (VL)
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4 Performance Criteria for Retroreflective Pavement Markers Safety Evaluation Most RPM safety studies show that as traffic volumes increase, the safety benefits of RPMs also increase. However, the existing literature is also inconsistent regarding the overall benefit of RPMs.
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Summary 5 Conversely, participants needed to be 51% closer to the worn pavement marking to be able to detect it. The results from the visibility modeling indicate that the VL model is a valid tool for evaluating the visibility level of RPMs and pavement markings.
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6 Performance Criteria for Retroreflective Pavement Markers position. Additionally, models were developed for the MAD in speed or lateral position for tangents and curves.
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Summary 7 compared to those without. In all cases, changes in speed, while statistically significant, were modest.
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8 Performance Criteria for Retroreflective Pavement Markers adequate visibility when markings alone may be insufficient (e.g., wet-night conditions)
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