互通立交迂回式匝道纵向加速度特性

为了提高互通式立交的行车安全,分别对南山立交和江南立交的四条迂回式匝道进行自然驾驶实车试验,共采集了33名驾驶员在不同匝道上行驶的纵向加速度,研究了速度变化阶段纵向加速度特性,分析了迂回式匝道变速阶段纵向加速度统计分布特征,并基于纵向加速度对匝道行车舒适性进行了评价。研究结果表明：(1)迂回式匝道速度变化模式分为三个阶段,分别是入弯减速阶段、稳定行驶阶段和出弯加速阶段；(2)同一匝道上,不同驾驶风格驾驶员的驾驶行为有较高的趋同性,但也有一定的差异,在匝道行驶过程中冒险型驾驶员比愤怒型和焦虑型驾驶员减速明显,男性驾驶员比女性驾驶员减速明显；(3)女性驾驶员行驶舒适性略高于男性驾驶员,入弯减速段行驶舒适性优于出弯加速段,冒险型和焦虑型驾驶员出弯加速阶段行驶不舒适占比接近50%。

Longitudinal Acceleration Characteristics of Roundabout Ramps of Interchange

In order to improve the traffic safety of interchanges, 4 roundabout ramps of Nanshan and Jiangnan interchange were tested by natural driving, and collected the longitudinal acceleration of drivers with different driving styles on different ramps, and studied the characteristics of longitudinal acceleration in the speed change stage, analyzed the statistical distribution characteristics of the longitudinal acceleration during the speed changing stage of the roundabout ramp, and evaluated the driving comfort of the ramp based on the Longitudinal acceleration. The results show that: (1) The change mode of the roundabout ramp speed can be divided into three stages, namely, the deceleration stage, the stable driving stage and the acceleration stage. (2) On the same ramp, the driving behaviors of drivers with different driving styles have high convergence, but there are some differences, and the deceleration is obvious in the course of driving on the ramp between adventurous and male drivers. (3) The driving comfort of female drivers is slightly higher than that of male drivers, and the driving comfort of entering and decelerating section is better than that of accelerating section out of the corner. The proportion of driving discomfort of adventure type and anxiety type driver in the acceleration phase out of corner is close to 50%.