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Wet Pavements Crash Study of Longitudinal and Transverse Tined PCC Pavements. Final rept.
| 题名： | Wet Pavements Crash Study of Longitudinal and Transverse Tined PCC Pavements. Final rept. |
| 作者： | Drakopoulos-A.; Kuemmel-D.A. |
| 关键词： | *Concrete-Pavement; *Crash-statistics; *Surface-textures.;Wet-pavements; Safety-performance; California-; Wisconsin-. |
| 摘要： | This report provides crash statistics for Longitudinally Tined (LT) Portland Cement Concrete (PCC) and Transversely Tined (TT) PCC pavement surfaces. The statistics were compiled for urban and rural freeways, classified in two Average Daily Traffic (ADT) categories: pavements carrying less than 60,000 vehicles per day (VPD) and those carrying an ADT in excess of 60,000 VPD. Crash experience on California longitudinally tined PCC pavements was compared to that of Wisconsin transversely tined PCC pavements. Safety performance of wet pavements was the focus of the analysis. Rural freeways were considered to be ideal for this study, given the prevailing high speeds, absence of extraneous influences on safety (e.g., cross streets, onstreet parking, pedestrians, traffic signals), and consistent design standards between the comparison states. Rainfall differences were accounted for with the use of hourly precipitation data, and terrain differences were taken into account by using level and rolling terrain California freeways (excluding mountainous terrain ones). Statistics were based on eight years of crash and hourly weather data (1991-1998). Crash rates were computed based on hundred-million-vehicle-miles of travel--more than 72 HMVM for Wisconsin and more than 500 HMVM for California. |
| 报告类型： | 科技报告 |
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