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首页> 外文期刊>Journal of transportation safety & security >Evaluation of the safety effectiveness of lane-departure countermeasures on two-lane undivided roadways using crash modification factors
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Evaluation of the safety effectiveness of lane-departure countermeasures on two-lane undivided roadways using crash modification factors

机译：基于碰撞修正因子的两车道未分巷车道偏离对策安全有效性评价

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摘要

This study investigates the safety effectiveness of commonly used lane-departure countermeasures on Kansas two-lane rural undivided road segments; 2-ft paved shoulders, centerline rumble strips, shoulder rumble strips, and shoulder & centerline rumble strips using crash modification factors (CMFs). Cross-sectional and case-control methods that are based on generalized linear regression assuming a negative binomial error structure and logistic regression models were used respectively. CMFs were calculated for all lane-departure and fatal and injury lane-departure crashes for tangent and curved road segments separately. Model validation of cross-sectional models was carried out using the mean of the absolute residuals and mean squared error (MSE). Classification tables were used to validate the models developed for the case-control method. Cross-sectional and case-control methods showed that all the countermeasures considered in this study were effective in reducing all lane-departure and fatal and injury lane-departure crashes except shoulder rumble strips on curved road segments for all lane-departure crashes. Even though similar results were obtained from both methods, CMFs developed using the cross-sectional method demonstrated a narrower range than the case-control method, indicating that the results from the cross-sectional method can be considered as more accurate and reliable than those from the case-control method.
机译：本研究调查了堪萨斯州两车道农村未分割路段常用车道偏离对策的安全有效性；使用碰撞修正系数（CMF）铺设2英尺的平铺路肩，中心线隆隆条，肩膀隆隆条以及肩膀和中心线隆隆条。分别使用基于负线性二项式误差结构的广义线性回归的横截面和案例控制方法和逻辑回归模型。分别针对切线段和弯道段的所有车道偏离以及致命和伤害车道偏离碰撞计算了CMF。使用绝对残差的均值和均方误差（MSE）进行横截面模型的模型验证。分类表用于验证为案例控制方法开发的模型。横断面和病例对照方法表明，本研究中考虑的所有对策均有效地减少了所有车道偏离以及致命和伤害性车道偏离事故，除了弯曲路段上的肩部隆隆带对所有车道偏离事故均有效。即使从这两种方法获得了相似的结果，但使用横截面方法开发的CMF都显示出比案例控制方法更窄的范围，这表明横截面方法的结果可以比来自方法的结果更准确和可靠。案例控制方法。

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