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Evaluation of the Impacts of Differential Speed Limits on Interstate Highways in Idaho.
| 题名： | Evaluation of the Impacts of Differential Speed Limits on Interstate Highways in Idaho. |
| 作者： | M. Dixon; A. Abdel-Rahim; S. Elbassuoni; |
| 关键词： | compliance, fatalities, injuries, motor vehicle accidents, regulations, rural areas, traffic control, traffic safety, trucks |
| 摘要： | In this research, an evaluation of the impacts of differential speed limits on rural interstate highways in Idaho was completed. The main purpose for this research was to determine if there have been any speed or safety effects after enacting the DSL, and also to study some of the geometric effects, like rumble-strips, on the safety of vehicles on rural Idaho interstates. Regarding the effects of DSL on speed, it was found that passenger car and truck speeds stabilized since the DSL policy implementation date. More specifically, the DSL reduced truck speeds, resulting in mean passenger vehicle and truck speeds of 74.7 and 65.6 mph, respectively. Regarding the DSL effect on speed compliance, Passenger vehicle compliance slightly worsened, while truck compliance improved. Establishment of the DSL policy also contributed to a decrease in the crash rates on Idaho's rural interstates. |
| 总页数： | 44p |
| 报告类型： | 科技报告 |
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