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Quantification of the Physical Properties Required of Raised Pavement Markers and Accelerated Laboratory Testing.
| 题名： | Quantification of the Physical Properties Required of Raised Pavement Markers and Accelerated Laboratory Testing. |
| 作者： | Gunaratne, M.; Guo, L.; Lu, Q.; Yu, B.; Zhang, Y. |
| 关键词： | Accuracy; Design; Finite Element Model; Florida; Impact Test; Laboratory Tests; Night Visibility; Pavement Markings; Physical Properties; Questionnaires; Raised Retroreflective Pavement Marker(rrpm); |
| 摘要： | Retroreflective raised pavement markers (RRPMs) can provide lane and directional information at night, particularly during wet weather conditions. In recent years, the RRPM service life in Florida has been generally shorter than expected. Moreover, the accuracy of current RRPM laboratory testing methods and procedures have been challenged. This report presents the research conducted over a two-year period to improve current RRPM designs and to develop new laboratory tests that can predict marker field performance. Current RRPM performance with typical failure modes and contributing factors were identified through literature review, nationwide questionnaire survey, and field survey. Finite element models (FEMs) of the tire/RRPM/pavement system were built to analyze the critical stress fields in RRPMs, for both field use scenarios and laboratory testing conditions, to explore the effects of various geometric features and material properties on critical stresses, and therefore to propose improved RRPM designs and laboratory test procedures. Strains in field RRPMs were measured with strain gauges to verify FEM results. Two new laboratory tests that better simulate field loading conditions were proposed, and a revised pendulum impact test was developed. New RRPM designs that may have an average service life longer than that of current RRPMs were recommended. |
| 报告类型： | 科技报告 |
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