Modeling connected and autonomous vehicles in heterogeneous traffic flow
Modeling connected and autonomous vehicles in heterogeneous traffic flow
复制标题
DOI：
10.1016/j.physa.2017.08.015
复制
发表时间：
2018-01-15
影响因子：
3.3
通讯作者：
Yamamoto, Toshiyuki
中科院分区：
文献类型：
--
作者：
Ye, Lanhang;Yamamoto, Toshiyuki
本研究的目的是开发一个异构的交通流模型，研究连接和自动驾驶汽车（CAV）对交通流的可能影响。在最近提出的两状态安全速度模型（TSM）的基础上，建立了一个双车道元胞自动机（CA）模型，其中将常规车辆和通用汽车都纳入到异质交通流中。特别是，考虑到这一新兴技术的新特性，包括通过自适应巡航控制的自动驾驶和通过短程通信的车辆间连接，建立了CAV的操作规则。在不同的CAV穿透率下，在非均匀流中进行了模拟。通过数值模拟研究了CAV对道路通行能力的影响。模拟结果表明，在非均匀流中，道路通行能力随着CAV穿透率的增加而增加。当通用汽车普及率达到30%时，道路通行能力逐渐增加，通用汽车通行能力差异对增长率的影响不大。当CAV穿透率超过30%时，其增长率在很大程度上取决于CAV的能力。容量越大，道路容量增长率越高。数值分析了CAV穿透率与道路通行能力之间的关系，为CAV对交通系统可能产生的影响提供了一些见解。(C)2017爱思唯尔B.V.保留所有权利。
The objective of this study was to develop a heterogeneous traffic-flow model to study the possible impact of connected and autonomous vehicles (CAVs) on the traffic flow. Based on a recently proposed two-state safe-speed model (TSM), a two-lane cellular automaton (CA) model was developed, wherein both the CAVs and conventional vehicles were incorporated in the heterogeneous traffic flow. In particular, operation rules for CAVs are established considering the new characteristics of this emerging technology, including autonomous driving through the adaptive cruise control and inter-vehicle connection via short-range communication. Simulations were conducted under various CAV-penetration rates in the heterogeneous flow. The impact of CAVs on the road capacity was numerically investigated. The simulation results indicate that the road capacity increases with an increase in the CAV-penetration rate within the heterogeneous flow. Up to a CAV-penetration rate of 30%, the road capacity increases gradually; the effect of the difference in the CAV capability on the growth rate is insignificant. When the CAV-penetration rate exceeds 30%, the growth rate is largely decided by the capability of the CAV. The greater the capability, the higher the road-capacity growth rate. The relationship between the CAV-penetration rate and the road capacity is numerically analyzed, providing some insights into the possible impact of the CAVs on traffic systems. (C) 2017 Elsevier B.V. All rights reserved.