Study on left-turn lane warrants for unsignalized intersections;
无信号交叉口左转车道设置依据研究
Aming at the design method of left-turn lane in highway intersection,referring to the design guides in developed countries,the deficiencies in the design guide of our country were analyzed.
针对平面交叉口左转车道的设计方法进行研究,参考发达国家平交路口安全设计规范,分析现有的设计技术规范中不合理的因素,从左转车道的布置、车道宽度的确定、车道长度的确定、过渡段的设计等几个方面,进行了详细的分析研究,提出了平面交叉口左转车道的几何设计方法。
The study focuses on saturation time headways of right-turning lane at typical intersections in China.
针对我国现有道路交通条件下典型的信号控制交叉口,对不同车道宽度、转弯半径的右转车道的饱和车头时距进行现场测定。
This paper analyzes the conflict feature of left turn traffic at level crossing in urban road,including conflict point,space and time feature,influence of left turn traffic to traffic at the crossing.
分析城市道路平面交叉口左转车流的冲突特征,包括冲突点、空间以及时间特征,左转车流对交叉口的交通影响。
Aimed at a kind of rotary cutting machine, the machining process of trihedron cutting is kinematically analyzed, and the moving locus equations of cutting edge are deduced.
对回转车削三面体的过程进行了运动学分析,建立了刀尖相对于工件的运动方程,计算了用该方法加工三面体零件时的各个参数。
These offer the basic theory to error calculation for random polygon,and realizes rotary cutting of polyhedron parts with ensuring precision and higher pr.
在此基础上对正多边形各边的直线度误差作了较详细的分析,推导出了误差的最大值与工件和刀具的中心距为a,刀刃回转半径为rm k之间的关系,为任意正多边形的误差计算提供了理论依据,从而在保证加工精度的前提下实现了多面体零件的回转车削,提高了加工效率。
Numerical simulation was performed with special attention to the disturbing effect of right-turning vehicles from the intersecting main road, the Wun.
基于该模型,对上海市内环线的武宁路匝道附近的交通流进行了案例分析,着重对主干道上的右转车辆干扰效应进行了数值模拟,所得结果与实测数据相当符合。