Extending the Cell Transmission Model to Multiple Lanes and Lane-Changing
Extending the Cell Transmission Model to Multiple Lanes and Lane-Changing
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DOI：
10.1007/s11067-013-9193-7
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发表时间：
2013-07
影响因子：
2.4
通讯作者：
M. Carey;C. Balijepalli;D. Watling
中科院分区：
文献类型：
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作者：
M. Carey;C. Balijepalli;D. Watling
宏观或基于流量的动态交通分配（DTA）模型通常将道路上每个方向的交通视为单车道，由于它们不考虑多车道，因此它们不能考虑换道行为。为了研究明确考虑车道和车道变换对结果的影响，我们考虑了由两个相邻的均匀车道组成的道路连接。我们假设进入每个车道的交通已经知道它希望在链路的末端退出哪个车道，它希望在同一车道还是在另一车道退出。我们使用细胞传输模型，但适应它，以允许从一个车道上的细胞在其他车道上的细胞移动的交通流量模型在每个车道上的交通流量。CTM的使用，因为它处理队列的建模和他们的溢出在一个直观的和广泛接受的方式，我们的扩展，它允许在一个车道的拥堵溢出到相邻的车道。特别是，我们调查如何变道和拥堵的影响，通过改变有关两个关键的行为参数的假设，即在驾驶员希望改变车道和车道变化（间隙接受）所需的车辆间距的位置相比，在同一车道（汽车跟随）时所需的间距。我们的结论是，有许多情况下，建模的链接作为一个单一的车道将给一个穷人的近似基本的多车道的行为，或无法捕捉的问题的利益，并在这些情况下，多车道建模是适当的。
Macroscopic or flow-based dynamic traffic assignment (DTA) models normally treat traffic in each direction on a roadway as a single lane and, since they do not consider multiple lanes, they can not consider lane-changing behaviour. To investigate how the results may be affected by explicitly considering lanes and lane changing, we consider a road link that consists of two adjacent homogeneous lanes. We assume that traffic entering each lane already knows in which lane it wishes to exit at the end of the link, whether it wishes to exit in the same lane or in the other lane. We model the traffic flows in each lane using a cell transmission model but adapt it to allow for traffic moving from cells in one lane to cells in the other lane. The CTM is used because it handles the modelling of queues and their spillback in an intuitive and widely accepted manner, and our extensions of it allow congestion in one lane to spill back into adjacent lanes. In particular, we investigate how lane-changing and congestion are affected by varying the assumptions concerning two key behavioural parameters, namely the locations at which drivers wish to change lanes and the vehicle spacing needed for lane changing (gap acceptance) as compared to the spacing needed when staying in the same lane (car following). We conclude that there are many situations where modelling a link as a single lane will give a poor approximation to the underlying multi-lane behaviour, or be unable to capture issues of interest, and for those situations multi-lane modelling is appropriate.