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首页> 外文期刊>International Journal of Modern Physics, C. Physics and Computers >HETEROGENEOUS TRAFFIC FLOW MODEL FOR A TWO-LANE ROUNDABOUT AND CONTROLLED INTERSECTION
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HETEROGENEOUS TRAFFIC FLOW MODEL FOR A TWO-LANE ROUNDABOUT AND CONTROLLED INTERSECTION

机译：两车道绕行和控制相交的异相交通流模型

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摘要

Modern urban traffic management depends heavily on the efficiency of road features, such as controlled intersections and multi-lane roundabouts. Vehicle throughput at any such configuration is modified by traffic mix, by rules governing manoeuvrability and by driver observance, as well as by traffic density. Here, we study heterogeneous traffic flow on two-lane roads through a cellular automata model for a binary mix of long and short vehicles. Throughput is investigated for a range of arrival rates and for fixed turning rate at an intersection: manoeuvres, while described in terms of left-lane driving, are completely generalisable. For a given heterogeneous distribution of vehicle type, there is a significant impact on queue length, delay times experienced and throughput at a fixed-cycle traffic light controlled two-way intersection and two-lane roundabout, when compared to the homogeneous case. As the proportion of long vehicles increases, average throughput for both configurations declines for increasing arrival rate, with average queue length and waiting time correspondingly increased. The effect is less-marked for the two-lane roundabout, due to absence of cross-traffic delays. Nevertheless, average waiting times and queue lengths remain uniformly high for arrival rates >0.25 vehicle per second (900 vph) on entry roads and for long vehicle proportion above 0.30–0.35.
机译：现代城市交通管理在很大程度上取决于道路要素的效率，例如受控的十字路口和多车道回旋处。在任何这样的配置下，车辆的通行量都可以通过交通混合，可操纵性规则和驾驶员遵守情况以及交通密度来进行修改。在这里，我们通过元胞自动机模型研究长车和短车的二元混合，在两车道道路上的异构交通流。对通行率的确定范围和交叉路口的固定转弯速率研究了吞吐量：操纵虽然以左行车道来描述，但可以完全概括。与同类情况相比，对于给定的车辆类型的异构分布，这对队列长度，经历的延迟时间和固定周期交通灯控制的双向交叉路口和双向两车道回旋处的吞吐量具有重大影响。随着长车辆的比例增加，两种配置的平均吞吐量都会下降，从而增加到达率，同时平均队列长度和等待时间也会相应增加。由于没有交叉路口的延误，对于两车道回旋处的影响较不明显。但是，对于进入道路上> 0.25车辆每秒（900 vph）的到达速度以及长于0.30–0.35的长车辆比例，平均等待时间和队列长度始终保持较高水平。

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