交叉口可变车道最佳车道功能及信号转变方法

Optimal Switching Method for Lane Assignment and Signal Control for Variable Lanes at Intersections

为了保障交叉口车道功能动态控制的效果,并在确保行车安全的前提下,减少车道功能转变过程中对交叉口通行能力所造成的损失和对驾驶员所造成的不适应性,对交叉口动态车道功能划分的实施方法进行了研究.实施方法分为两个步骤,首先基于二进制优化判断模型,确定实施方案;在此基础上,根据信号相位变化的类型,考虑安全、效率及快捷等因素,确定方案实施的时刻.研究表明,并不是所有最优的车道功能方案都有必要实施,此外,方案实施时刻也会根据转变前后车道功能和信号控制情况而变化.

In order to enhance the effect of the dynamic lane assignment technology, and reduce the negative impact on traffic capacity and the inadaptation on drivers during the changing of lane assignment, an implementation method was proposed. The method consists of two steps. The first step is to identify a suitable implementation scheme by determining a binary-type threshold. The second step is to obtain the best changing time of the optimal lane assignment scheme in consideration of safety,efficiency,and speediness. The results of numerical examples show that not all the optimal schemes of the dynamic lane assignment are necessary to be used. Moreover, the proposed method could find a suitable changing time according to the optimization and the status quo lane assignments as well as the signal phase schemes.