Kerner Boris S, Klenov Sergey L, Hermanns Gerhard, Hemmerle Peter, Rehborn Hubert, Schreckenberg Michael
Physik von Transport und Verkehr, Universität Duisburg-Essen, 47048 Duisburg, Germany.
Department of Physics, Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Moscow Region, Russia.
Phys Rev E Stat Nonlin Soft Matter Phys. 2013 Nov;88(5):054801. doi: 10.1103/PhysRevE.88.054801. Epub 2013 Nov 8.
Based on numerical simulations with a stochastic three-phase traffic flow model, we reveal that moving queues (moving jams) in oversaturated city traffic dissolve at some distance upstream of the traffic signal while transforming into synchronized flow. It is found that, as in highway traffic [Kerner, Phys. Rev. E 85, 036110 (2012)], such a jam-absorption effect in city traffic is explained by a strong driver's speed adaptation: Time headways (space gaps) between vehicles increase upstream of a moving queue (moving jam), resulting in moving queue dissolution. It turns out that at given traffic signal parameters, the stronger the speed adaptation effect, the shorter the mean distance between the signal location and the road location at which moving queues dissolve fully and oversaturated traffic consists of synchronized flow only. A comparison of the synchronized flow in city traffic found in this Brief Report with synchronized flow in highway traffic is made.
基于随机三相交通流模型的数值模拟，我们发现，过饱和城市交通中的移动队列（移动拥堵）在交通信号灯上游一定距离处消散，同时转变为同步流。研究发现，与高速公路交通情况一样[克纳，《物理评论E》85，036110（2012）]，城市交通中的这种拥堵消散效应可通过驾驶员强烈的速度适应性来解释：移动队列（移动拥堵）上游车辆之间的车头时距（空间间隙）增加，导致移动队列消散。结果表明，在给定的交通信号参数下，速度适应性效应越强，移动队列完全消散且过饱和交通仅由同步流组成时，信号位置与道路位置之间的平均距离就越短。本文简要报告中发现的城市交通同步流与高速公路交通同步流进行了比较。
