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双语推荐：交通波理论

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过饱和状态下,干线车辆排队现象严重,道路空间资源紧张,必要时应对干线沿线交叉口进行红波控制,避免交叉口死锁和拥堵扩散。首先分析了过饱和以及过饱和下的交通特性,然后运用交通波理论分析了交叉口的车辆排队现象,在此基础上研究了过饱和下干线红波控制方法与主要参数确定。
Under the state of supersaturating, serious vehicles queuing on arterial road, and tight road space, there is a requirement for the crossings to use red wave control strategy to avoid intersection deadlock and congestion diffusion. This paper firstly analyzes the oversaturated state and the traffic characteristics of this state, then uses the traffic wave theory to analyze vehicle queuing phenomenon before the intersection, and finally discusses the red wave control method under oversaturated state and parameters determination.

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针对车道占用对道路的实际通行能力的影响,结合各种经验公式并且综合考虑各种实际因素的影响,求出事故发生至撤离期间该路段的实际通行能力.综合运用分析对比方法和交通波理论等方法对问题进行分析,建立交通波模型,得出了问题的相关结论.最后根据车流波动理论对车辆排队现象进行分析,同时利用集结波与疏散波的相遇推出集结波波速与排队长度的关系.结合信号灯对车辆排队长度的影响得到当车辆排队长度达到上游路口时所需的时间.
Aiming at the problem of the effects of lane occupied on city road capacity,combined with the experience formula and considering the effect of various factors getting the actual capacity of the Accident section. Comparative analysis method and the traffic wave theory methods are used to analyze the problem,Building traffic wave model to obtain conclusions. Finally,according to the traf-fic flow wave theory to analyze the vehicles queuing phenomenon. meanwhile,finding the relationship between aggregation wave and the queue length. combined the effects of signal lamp to obtain the required time when the vehicle queue length to the upstream intersec-tion.

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城市道路上的车流主要是公交车和小汽车混合流，而一般交通流理论都是以小汽车流为对象进行研究和建模。基于运动波理论和线性元胞自动机模型，本文提出了一种宏观与微观空间表现尺度相结合的双车道混合交通流组合建模方法分析。
Traffic flow on city road is mainly compised of public transport vehicles and the car stream. But most theories and models about traffic flow were based on small cars. An approach coupling with both macroscopic and microscopic traffic description is presented based on the KW (Kinematic Wave) theory and CA(L)(Cellular automata (linear)) traffic flow model.

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考虑前方交通状态对驾驶行为的影响,提出了新的交通流格子模型.通过线性稳定性和非线性分析,获得了改进模型的中性稳定性条件和mKdv方程密度波解.理论分析和数值模拟表明,驾驶员通过关注前方交通状态,选择平稳的驾驶行为,减少不必要的加减速行为,保证车辆的平稳运行,从而进一步改善交通,增强交通流的稳定性.
A new lattice model of traffic flow is proposed by considering the effect of front traffic situa-tion on driving behaviors.The neutral stability condition and the solution of the mKdV equation are ob-tained by the linear stability analysis and nonlinear analysis for the improved model.Theoretic analysis and numerical simulation show that the driver will choose his/her smooth driving behaviors to decrease the unnecessary acceleration and deceleration behaviors and guarantee the car run steadily,which will further improve the traffic and strengthen the stability of traffic flow.

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针对车道被占用对城市道路通行能力的影响及车辆排队。根据交通波、排队论等理论,构建了道路通行能力评价和交通波滞动等模型,综合运用MATLAB软件和Excel软件进行分析及求解,总结出事故对实际通行能力影响的变化过程,不同车道对实际通行能力影响的差异,得到车辆排队长度与事故横断面实际通行能力、事故持续时间、路段上游车流量间的关系,计算出车辆排队长度到达上游路口的时间。
The paper focuses on the lane occupation effects of traffic capacity and vehicle queue. Based on the traffic wave and queue theory, traffic capacity evaluation model and traffic viscosity kinematic model are built. Applying MATLAB and Excellto analysis and solving, accident effects on change of traffic capacity and the variation impacts of different lanes to traffic capacity are summed up. Also, the relationship among vehicle queue length, traffic capacity, traffic accident time and traffic flow is obtained. Based on traffic wave viscosity kinematic model, time of vehicle queue length reaching upstream can be calculated.

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本文以交通事故这种异常事件为例,分别对公路基本路段内交通事故影响时间、车辆排队长度、事故影响下不同时间段内不同路段断面流量变化和不同路段发生事故的车流变化进行了分析.采用交通波理论给出了该事故路段内不同阻塞行车道宽度的车辆排队长度.
Based on events of traffic accident , this paper analyzes the time taken by accidents in average city roads, length of traffic queuing , and sectioned traffic changes and vehicleflow changes under the effects of acci-dents. Using the traffic wave theory , this paper gives the lengths of queuing in jammed lanes of various widths .Un-der realistic circumstances , an event of accident , from the moment the accident occurs to the arrival of police , ac-cident scene investigation , handling, clearance and restoration , can be broken down into four phases , i.e.pre-ac-cident moment , moment from the occurrence to investigation , moment from investigation to the clearance of the scene, and restoration after the scene has been cleared .The procedures of an accident event are not clear-cut, and the analysis of the accident mainly focuses on the moment of the occurrence to traffic restoration .The effects of po-lice handling hereby are not studied .

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针对间歇性优先公交车道预留长度的应用现状,提出了基于交通波理论的预留长度模型。介绍了间歇性优先公交车道的概念,分析了影响间歇性优先车道预留长度的因素,给出了公交车进站前、后不同的预留长度计算模型。通过算例,对模型的实用性进行了验证。
According to the present application status of the reserved length of bus lanes with intermittent priority,a reserved length model is proposed.The concept of bus lanes with intermittent priority is introduced.The factors that influence the reserved length of bus lanes with intermittent priority are discussed.On the basis of the above analysis, models that are used to calculate the reserved length are obtained.An example is applied to verify the utility of models.

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随着社会经济的发展和城市化进程的加快,城市交通问题日益严重,城市道路通行能力受诸多因素影响,其中交通事故影响最为显著.本文以两起典型交通事故为例,对事发路段通行能力进行研究.结合交通事故中的实际情况,建立交通波理论模型,用MATLAB软件对交通数据进行分析和处理,得到事故所处横断面实际通行能力变化的折线和拟合曲线图.通过对比分析,得到两种典型事故中实际通行能力的变化情况,并对通行能力变化原因进行了详细阐述和科学评价.因此,文中的研究方法和结果具有一定的科学性,为城市道路交通管理提供了重要的参考依据.
With the development of social economy and the speeding up of urbanization, transport problems have became increasingly prominent, urban road traffic capacity is influenced by many factors, but the most significant is traffic accident .To study the road capacity ,two typical traffic accidents as the example are used in this paper. Combining with the actual situation of road traffic accident, setting up the model of traffic wave theory, using MATLAB software to analyze and process traffic data, we received the actual capacity changes line and curve fitting during an accident in cross section. Through contrastive analysis, two kind of typical reasons of traffic changes are gotten, and traffic capacity changes are elaborated and evaluated scientifically. So the research methods and results in this paper are scientific, and also provides an important reference basis for urban road traffic management.

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延误是交叉口交通设计和信号优化的重要评价指标。针对传统延误计算仅考虑单个交叉口的不足，本文构建了综合考虑上下游交叉口交通运行参数的延误计算模型。模型以交通波理论为基础，综合考虑了上下游交叉口的相位相序、绿灯时长、流向流量、路段长度及相位差等因素，通过计算下游交叉口队尾时空点在各相位的演变构建队尾时空多边形，计算队尾时空多边形的面积即可得到下游交叉口计算车道组的停车延误，将其加上加减速延误最终得到交叉口信号控制延误。示例分析表明，该模型与VISSIM和SYNCHRO等软件相比，延误计算精度较高。
Intersection delay is an important evaluation index for traffic design and signal optimization. To overcome the demerit that the traditional delay calculation method considers about the isolated intersection, a new delay model is built by taking into the up-stream and down-stream intersections considerations. The model is based on the traffic-wave theory, and it synthesized analyzes the main influential parameters of up-stream and down-stream intersections, such as phases, splits, movement volume, link length, offset, etc. A polygon formed by spatiotemporal coordinates of the queues rears is constructed by capturing the evolution of queue phase by phase, which area is used to calculate the stop delay of the object lane-group of down-stream intersection. The intersection signal control delay can be counted by adding stop delay and acceleration-deceleration delay. Through a case study comparing with VISSIM and SYNCHRO software, it is found that the model is reliable for interse

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