Appert-Rolland Cécile
Laboratoire de Physique Théorique, Université Paris-Sud 11, CNRS UMR 8627, Bât 210, 91405 Orsay Cedex, France.
Phys Rev E Stat Nonlin Soft Matter Phys. 2009 Sep;80(3 Pt 2):036102. doi: 10.1103/PhysRevE.80.036102. Epub 2009 Sep 2.
Single vehicle data obtained from magnetic loops on an expressway allowed us to measure velocity correlations and velocity differences between non-neighbor vehicles on the same lane, showing some strong correlations even for platoons of 7 or 8 vehicles. The corresponding time headway distribution for non-neighbor vehicles is also presented. We were also able to get some informations about interlane structures, through crossed time headway distributions. It should be noticed that these last results on crossed time headways are meaningful only because the subset of data we used corresponds to a unique stationary traffic state and still contains a large amount of data, with a large fraction of short time headways. The link with passing maneuvers is discussed.
从高速公路上的磁环获取的单车数据使我们能够测量同一车道上非相邻车辆之间的速度相关性和速度差异，结果表明即使对于由7或8辆车组成的车队，也存在一些强相关性。还给出了非相邻车辆相应的车头时距分布。通过交叉车头时距分布，我们还能够获取一些关于车道间结构的信息。需要注意的是，这些关于交叉车头时距的最新结果之所以有意义，仅仅是因为我们使用的数据子集对应于一个独特的稳定交通状态，并且仍然包含大量数据，其中短车头时距占很大比例。文中还讨论了与超车操作的联系。
