Modeling and simulation of the car-truck heterogeneous traffic flow based on a nonlinear car-following model
Modeling and simulation of the car-truck heterogeneous traffic flow based on a nonlinear car-following model
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基于非线性跟驰模型的车车异构交通流建模与仿真
DOI：
10.1016/j.amc.2015.10.032
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发表时间：
2016-01-15
影响因子：
4
通讯作者：
Yang, Da
中科院分区：
文献类型：
--
作者：
Liu, Lan;Zhu, Liling;Yang, Da
近年来，由于车辆类型差异引起的交通流不均匀问题越来越受到人们的关注。本文利用实际数据研究了跟车(CC)、跟车(CT)、跟车(TC)和跟车(TT)四种跟车组合的交通流特征。针对现有跟车模型(最优速度模型)不能反映实际非均匀交通流复杂程度的缺点，提出了一种基于非线性常微分式跟驰模型的智能驾驶员模型(IDM)。应用下一代仿真(NGSIM)车辆轨迹数据对所提出的模型进行了标定和评估。在标定模型的基础上，研究了轿车-卡车非均匀交通流的交通流态、线性稳定性、基本原理图和冲击波特性。研究结果揭示了轿车-卡车非均匀交通流的一些新发现。当卡车达到最大速度时，就会出现拥堵和自由流动的混合状态。轿车和卡车既可以稳定交通流，也可以破坏交通流的稳定，这取决于组合类型和平衡速度。此外，不同轿车-卡车组合的基本图集汇聚成几个具有相同比例差异的CC和TT组合。模拟中观察了货车加速对冲击波在车-货车非均匀交通流中传播的影响。(C)2015 Elsevier Inc.保留所有权利。
The traffic flow heterogeneity caused by vehicle type difference has drawn increasing attention recently. This paper uses real data to explore the characteristics of the traffic flow consisting of the four types of car-truck car-following combinations, car-following-car (CC), car-following-truck (CT), truck-following-car (TC) and truck-following-truck (TT). To overwhelm the shortcoming that the existing car-following model, Optimal Velocity Model, cannot reflect the complexity of real heterogeneous traffic flow, a new model is proposed based on a nonlinear ordinary differential car-following model, Intelligent Driver Model (IDM). Next Generation Simulation (NGSIM) vehicle trajectory data is applied to calibrate and evaluate the proposed model. Based on the calibrated model, the traffic regime, linear stability, fundamental diagrams, and shock wave characteristics of the car-truck heterogeneous traffic flow are investigated. The results reveal some new findings of the car-truck heterogeneous traffic flow. The mixture of congested and free flow regime occurs when the trucks reach their maximum speeds. Cars and trucks can both stabilize and destabilize the traffic flow, depending on the combination type and the equilibrium velocity. Moreover, the fundamental diagrams of different car-truck combinations converge to several clusters with the same proportion difference between the CC and TT combinations. The speeding-up effect of trucks on shock wave propagation in the car-truck heterogeneous traffic flow is observed in the simulation. (C) 2015 Elsevier Inc. All rights reserved.