城市快速路互通立交最小间距

Minimum Interchange Spacing of Urban Expressway

为了得到符合我国交通流特性的城市快速路互通立交最小间距,实现城市快速路的安全高效运行,首先对城市快速路互通立交间距的组成要素进行了分析,将其分为加速车道长度、两立交净距和减速车道长度3部分;然后以概率论和微分法相结合的思想,结合主线交通量对加速车道长度进行了研究;以概率论和微分法相结合的思想,结合交通标志的位置设置对互通立交净距进行了研究;运用动力学原理并结合驾驶员的驾驶舒适度对减速车道长度进行了研究。从而得到了城市快速路互通立交最小间距模型。最后计算得到符合我国实际的城市快速路互通立交最小间距值。

To obtain the minimum interchange spacing adapt to the traffic flow in China, and to realize the safe and efficient running on urban expressway, firstly, compositive elements of interchange spacing of urban expressway, including the length of acceleration lane, the length of deceleration lane and the distance between them, were analyzed. Secondly, by combining probability theory and differential method, and taking mainline traffic volume into consideration, the length of acceleration lane was researched.Then, with the same thought above and considering the setting requirement of traffic signs on urban expressway, the distance between acceleration lane and deceleration lane was studied. And then, applying dynamics theory and considering drivers＇feelings, the length of deceleration lane was studied as well. Lastly, based on these analyses, the minimum interchange spacing model was established, and the minimum interchange spacing of urban expressway was calculated.