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arXiv 2201.00381math.OCphysics.soc-ph
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多种群交通流的稳定性

Stability of multi-population traffic flows

Amaury Hayat, Benedetto Piccoli, Shengquan Xiang

摘要:

交通波,也被称为走走停停波或幻影火腿,自然地表现为交通不稳定性,在封闭的环境中也是如此。研究了环形道路上的多种群交通,其中驾驶员具有稳定和不稳定行为。存在一个稳定车辆的临界通过率,在该临界通过率以上系统是稳定的,在该临界通过率以下系统是不稳定的。在后一种情况下,如果路上有足够的汽车,就会出现走走停停的波动。临界渗透率是明确可计算的,并且在合理的情况下,少数激进的驱动程序足以破坏原本非常稳定的流。这是一个单一人口模型无法解释的不稳定性来源。此外,多人口系统可以稳定低于临界渗透率,如果汽车的数量是足够小的。不稳定性随着汽车数量的增加而出现,即使交通密度保持不变(即汽车数量和道路尺寸类似地增加)。这表明,小实验可能导致推导不精确的稳定性条件。

英文摘要:

Traffic waves, known also as stop-and-go waves or phantom hams, appear naturally as traffic instabilities, also in confined environments as a ring-road. A multi-population traffic is studied on a ring-road, comprised of drivers with stable and unstable behavior. There exists a critical penetration rate of stable vehicles above which the system is stable, and under which the system is unstable. In the latter case, stop-and-go waves appear, provided enough cars are on the road. The critical penetration rate is explicitly computable, and, in reasonable situations, a small minority of aggressive drivers is enough to destabilize an otherwise very stable flow. This is a source of instability that a single population model would not be able to explain. Also, the multi-population system can be stable below the critical penetration rate if the number of cars is sufficiently small. Instability emerges as the number of cars increases, even if the traffic density remains the same (i.e. number of cars and road size increase similarly). This shows that small experiments could lead to deducing imprecise stability conditions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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