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绿色交通理念下的慢行系统规划方法研究 被引量:40
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作者 秦茜 袁振洲 田钧方 《规划师》 北大核心 2012年第S2期5-10,共6页
绿色交通旨在协调、优化各种运输方式,提高整体的交通效率,降低能源消耗和污染,促进环境与社会公平,其本质是可持续发展。慢行交通是最能体现绿色交通本质的交通方式,实现居民的短距离出行和接驳公共交通。慢行系统的规划方法可从街区... 绿色交通旨在协调、优化各种运输方式,提高整体的交通效率,降低能源消耗和污染,促进环境与社会公平,其本质是可持续发展。慢行交通是最能体现绿色交通本质的交通方式,实现居民的短距离出行和接驳公共交通。慢行系统的规划方法可从街区尺度、慢行网络、公交衔接和设施景观设计等方面入手。涿州生态示范基地慢行系统规划对此进行了实践。 展开更多
关键词 交通规划 绿色交通 慢行交通 涿州生态示范基地
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无信号T型交叉口交通流特性研究 被引量:3
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作者 范宏强 贾斌 +1 位作者 李新刚 田钧方 《交通运输系统工程与信息》 EI CSCD 北大核心 2012年第1期185-192,共8页
在T型交叉口中存在直行、左转、右转三种车流.在考虑所有方向车流的情况下,本文提出了一种用于研究无信号T型交叉口交通流特性的元胞自动机模型.模型采用了防止车辆之间发生碰撞以及出现死锁现象的规则.通过模型模拟,本文分别研究了主... 在T型交叉口中存在直行、左转、右转三种车流.在考虑所有方向车流的情况下,本文提出了一种用于研究无信号T型交叉口交通流特性的元胞自动机模型.模型采用了防止车辆之间发生碰撞以及出现死锁现象的规则.通过模型模拟,本文分别研究了主干路车辆流入率、各车道的左转车流和右转车流对交叉口的影响,其中右转车流的影响是研究重点.结果表明,右转车流量的增加可以促进次干路和主干路内侧车道流量的增加,但是会减少主干路外侧车道的流量;当主干路外侧车道车辆流入率足够大且内侧车道车辆流入率足够小时,次干路的右转车流会促进主干路外侧车道的流量增加. 展开更多
关键词 城市交通 交通流特性 元胞自动机模型 无信号T型交叉口
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国外无车化住宅区建设及其启示
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作者 马陶 袁振洲 +1 位作者 田钧方 王彪 《公路与汽运》 2013年第2期42-45,共4页
随着中国私有机动车保有量的飞速增长,住宅区内部随意穿梭停车现象日益频繁,居民原本舒适的居住环境因此受到影响。为了缓解该现象、改善人居环境,文中分别从设施选址、交通规划、环境建设和经营管理4个方面介绍了国外无车化住宅区的先... 随着中国私有机动车保有量的飞速增长,住宅区内部随意穿梭停车现象日益频繁,居民原本舒适的居住环境因此受到影响。为了缓解该现象、改善人居环境,文中分别从设施选址、交通规划、环境建设和经营管理4个方面介绍了国外无车化住宅区的先进案例,并结合国内实际对中国无车化住宅区建设进行探索,给出了初步建议。 展开更多
关键词 交通管理 无车化 用地尺度 住宅区
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基于轨迹数据的车辆跟驰行为分析与建模综述 被引量:10
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作者 田钧方 朱陈强 +1 位作者 贾宁 马寿峰 《交通运输系统工程与信息》 EI CSCD 北大核心 2021年第5期148-159,共12页
随着轨迹收集技术与数据分析技术的迅速发展,越来越多的车辆行驶轨迹被采集并用于交通流研究。车辆轨迹数据主要包括车辆运行的位置与时间等信息,利用这些信息可以推算出车辆的速度、加速度及其与前车之间的空间和时间距离等驾驶行为参... 随着轨迹收集技术与数据分析技术的迅速发展,越来越多的车辆行驶轨迹被采集并用于交通流研究。车辆轨迹数据主要包括车辆运行的位置与时间等信息,利用这些信息可以推算出车辆的速度、加速度及其与前车之间的空间和时间距离等驾驶行为参量。通过研究轨迹数据可以揭示车辆自身的运行规律,车辆之间的相互作用规律,道路环境对车辆的作用规律,以及由此产生的宏观、微观交通流现象,因此,轨迹数据研究受到日益重视。本文简要回顾了与轨迹数据收集相关的历史,介绍了自然场景下采集的Next Generation SIMulation(NGSIM)数据及实验场景下采集的车队轨迹数据,并梳理了近几年基于车辆跟驰轨迹的理论研究。首先,分析以交通振荡、交通回滞为代表的交通流关键实测现象研究工作;整理跟驰行为分析方面的研究成果,包括不对称跟驰行为、稳定跟驰行为的存在性、跟驰行为的记忆效应、任务难度、随机性、异质性。之后,介绍基于跟驰行为分析成果而构建的仿真模型。最后,从3个方面评述现有基于轨迹数据的研究,并提出未来展望:交通流关键实测现象方面,应收集更多不同条件下的数据,并尝试构建更加普适性的理论或模型解释交通流现象;跟驰行为分析方面,可结合数据挖掘技术或生理、心理理论,量化驾驶员跟驰特性与生理、心理特征,并将两者结合深入分析跟驰行为的机理;仿真建模方面,可更多考虑驾驶员生理和心理变量,使模型更具人性化特征,并关注模型的评价方法,注重模型对实际交通流的解释能力。 展开更多
关键词 城市交通 交通流理论 交通流现象 跟驰行为 交通流模型
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A new car-following model considering velocity anticipation 被引量:8
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作者 田钧方 贾斌 +1 位作者 李新刚 高自友 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第1期197-203,共7页
The full velocity difference model proposed by Jiang et al. [2001 Phys. Rev. E 64 017101] has been improved by introducing velocity anticipation. Velocity anticipation means the follower estimates the future velocity ... The full velocity difference model proposed by Jiang et al. [2001 Phys. Rev. E 64 017101] has been improved by introducing velocity anticipation. Velocity anticipation means the follower estimates the future velocity of the leader. The stability condition of the new model is obtained by using the linear stability theory. Theoretical results show that the stability region increases when we increase the anticipation time interval. The mKdV equation is derived to describe the kink-antikink soliton wave and obtain the coexisting stability line. The delay time of car motion and kinematic wave speed at jam density are obtained in this modeh Numerical simulations exhibit that when we increase the anticipation time interval enough, the new model could avoid accidents under urgent braking cases. Also, the traffic jam could be suppressed by considering the anticipation velocity. All results demonstrate that this model is an improvement on the full velocity difference model. 展开更多
关键词 CAR-FOLLOWING traffic flow velocity anticipation
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Flow difference effect in the lattice hydrodynamic model 被引量:3
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作者 田钧方 贾斌 +1 位作者 李新刚 高自友 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第4期31-36,共6页
In this paper, a new lattice hydrodynamic model based on Nagatani's model INagatani T 1998 Physica A 261 5991 is presented by introducing the flow difference effect. The stability condition for the new model is obtai... In this paper, a new lattice hydrodynamic model based on Nagatani's model INagatani T 1998 Physica A 261 5991 is presented by introducing the flow difference effect. The stability condition for the new model is obtained by using the linear stability theory. The result shows that considering the flow difference effect leads to stabilization of the system compared with the original lattice hydrodynamic model. The jamming transitions among the freely moving phase, the coexisting phase, and the uniform congested phase are studied by nonlinear analysis. The modified KdV equation near the critical point is derived to describe the traffic jam, and kink -antikink soliton solutions related to the traffic density waves are obtained. The simulation results are consistent with the theoretical analysis for the new model. 展开更多
关键词 lattice hydrodynamic model traffic flow flow difference
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Traffic flow of connected and automated vehicles at lane drop on two-lane highway: An optimization-based control algorithm versus a heuristic rules-based algorithm
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作者 刘华清 姜锐 +1 位作者 田钧方 朱凯旋 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第1期380-391,共12页
This paper investigates traffic flow of connected and automated vehicles at lane drop on two-lane highway. We evaluate and compare performance of an optimization-based control algorithm(OCA) with that of a heuristic r... This paper investigates traffic flow of connected and automated vehicles at lane drop on two-lane highway. We evaluate and compare performance of an optimization-based control algorithm(OCA) with that of a heuristic rules-based algorithm(HRA). In the OCA, the average speed of each vehicle is maximized. In the HRA, virtual vehicle and restriction of the command acceleration caused by the virtual vehicle are introduced. It is found that(i) capacity under the HRA(denoted as C_(H)) is smaller than capacity under the OCA;(ii) the travel delay is always smaller under the OCA, but driving is always much more comfortable under the HRA;(iii) when the inflow rate is smaller than C_(H), the HRA outperforms the OCA with respect to the fuel consumption and the monetary cost;(iv) when the inflow rate is larger than C_(H), the HRA initially performs better with respect to the fuel consumption and the monetary cost, but the OCA would become better after certain time. The spatiotemporal pattern and speed profile of traffic flow are presented, which explains the reason underlying the different performance. The study is expected to help for better understanding of the two different types of algorithm. 展开更多
关键词 traffic flow connected and automated vehicles(CAVs) lane drop optimization-based control algorithm Heuristic rules-based algorithm
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Flow difference effect in the two-lane lattice hydrodynamic model
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作者 王涛 高自友 +2 位作者 赵小梅 田钧方 张文义 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第7期207-215,共9页
By introducing a flow difference effect, a modified lattice two-lane traffic flow model is proposed, which is proved to be capable of improving the stability of traffic flow. Both the linear stability condition and th... By introducing a flow difference effect, a modified lattice two-lane traffic flow model is proposed, which is proved to be capable of improving the stability of traffic flow. Both the linear stability condition and the kink-antikink solution derived from the modified Korteweg-de Vries (mKdV) equation are analyzed. Numerical simulations verify the theoretical analysis. Futhermore, the evolution laws under different disturbances in the metastable region are studied. 展开更多
关键词 traffic flow flow difference lattice hydrodynamic model modified Korteweg-de VriesKdV equation
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