【摘要】 为探究高速公路不同曲率非对称边缘率标线对车辆运行特性的影响，明确其设施作用效果，以湖北省鄂咸高速公路某两处不同曲率路段为对象，设计了不同曲率段铺设非对称标线前后的4种试验方案，并开展实车驾驶试验。采集自然驾驶状态下车辆的轨迹数据，对比分析车辆行驶在不同曲率段铺设标线前后的速度、加速度和横向偏移的变化模式、整体特征和幅值分布，并以曲率和是否铺设标线为影响变量进行双因素方差检验，分析其对驾驶行为的显著性。研究结果表明：从各位置处和整体上看，曲率和是否铺设标线两者主效应均对驾驶行为具有显著性，大曲率路段较小曲率路段速度和加速度更低，横向偏移更大，分布更离散；铺设非对称边缘率标线能够改善驾驶行为，有效降低车辆行驶速度、加速度和横向偏移，减少交通流内部运行差异，提高行车安全和稳定性，且在曲中位置改善效果最好；曲率和是否铺设标线的交互作用对速度、加速度和横向偏移具有显著性，标线对大曲率路段速度、加速度和横向偏移改善效果优于小曲率时。研究结果可为高速公路曲线段非对称边缘率标线的有效性提供理论依据，为交通控制设施的设置与应用设计提供参考。更多还原

【Abstract】 To study the influence of asymmetric edge rate markings with different curvatures on vehicle operation characteristics and clarify the effect of facilities, this paper takes two different curvature sections of E-Xian Expressway in Hubei Province as the research object. Four test schemes are designed before and after laying asymmetric markings in different curvature sections and real vehicle driving tests are conducted. The trajectory data of the vehicle in the natural driving state are compared and analyzed, revealing the change patterns, overall characteristics and amplitude distribution of the speed, acceleration and lateral offset of the vehicle before and after laying the markings in different curvature sections. The curvatures and markings are employed as the influencing variables for the two-factor variance test and their significance to the driving behavior is analyzed.Results show the curvature and markings exert huge impacts on driving behaviors. The speed and acceleration of large curvature sections are lower than those of small curvature sections, the lateral offset is larger and the distribution is more discrete. The asymmetric edge rate markings improve driving behaviors, effectively reduce vehicle speed, acceleration and lateral offset, decrease the internal operation difference of traffic flow, enhance driving safety and stability. The improvement of the position in the curve is the best. The interaction between curvatures and markings significantly impacts velocity, acceleration and lateral offset. The markings better improve the velocity, acceleration and lateral offset of large curvatures than those of small curvatures. Results may provide some insights for effective asymmetric edge rate markings on highway curve segments as well as the setting and design of traffic control facilities.更多还原