中国城市正面临存量精细化建设的新阶段,城市街道景观的破碎化导致了部分街道忽略了其承载市民公共活动的重要功能。以破碎环境织补和连接为理念的景观织补理论对街道景观建设具有指导意义。总结了街道景观织补理论的特征,使用金字塔场...中国城市正面临存量精细化建设的新阶段,城市街道景观的破碎化导致了部分街道忽略了其承载市民公共活动的重要功能。以破碎环境织补和连接为理念的景观织补理论对街道景观建设具有指导意义。总结了街道景观织补理论的特征,使用金字塔场景分析网络(pyramid scene parsing network,PSPNet)分析哈尔滨市1098条街道的街景影像,并以景观织补理论为视角分析哈尔滨市街道景观质量,最终发现研究区域内建筑与天空界面的变化剧烈程度、街道围合度、线密度、建筑可视因子、步行道路、各类兴趣点(point of interest,POI)的密度分布相似,均呈中心高四周低的分布态势,而植物界面变化剧烈程度、天空可视因子、植被可视因子、交通标识在图像中的占比、机动车道路在图像中的占比分布相反。本文研究揭示了哈尔滨城市街道景观织补理论特征的分布和内在关系,丰富了景观织补理论研究体系,以期为城市视角下街道景观织补策略提供一定思路。展开更多
Purpose–This paper aims to use activefine lane management methods to solve the problem of congestion in a weaving area and provide theoretical and technical support for traffic control under the environment of intellig...Purpose–This paper aims to use activefine lane management methods to solve the problem of congestion in a weaving area and provide theoretical and technical support for traffic control under the environment of intelligent connected vehicles(ICVs)in the future.Design/methodology/approach–By analyzing the traffic capacities and traffic behaviors of domestic and foreign weaving areas and combining them withfield investigation,the paper proposes the active andfine lane management methods for ICVs to optimal driving behavior in a weaving area.The VISSIM simulation of trafficflow vehicle driving behavior in weaving areas of urban expressways was performed using research data.The influence of lane-changing in advance on the weaving area was evaluated and a conflict avoidance area was established in the weaving area.The activefine lane management methods applied to a weaving area were verified for different scenarios.Findings–The results of the study indicate that ICVs complete their lane changes before they reach a weaving area,their time in the weaving area does not exceed the specified time and the delay of vehicles that pass through the weaving area decreases.Originality/value–Based on the vehicle group behavior,this paper conducts a simulation study on the active traffic management control-oriented to ICVs.The research results can optimize the management of lanes,improve the traffic capacity of a weaving area and mitigate traffic congestion on expressways.展开更多
文摘中国城市正面临存量精细化建设的新阶段,城市街道景观的破碎化导致了部分街道忽略了其承载市民公共活动的重要功能。以破碎环境织补和连接为理念的景观织补理论对街道景观建设具有指导意义。总结了街道景观织补理论的特征,使用金字塔场景分析网络(pyramid scene parsing network,PSPNet)分析哈尔滨市1098条街道的街景影像,并以景观织补理论为视角分析哈尔滨市街道景观质量,最终发现研究区域内建筑与天空界面的变化剧烈程度、街道围合度、线密度、建筑可视因子、步行道路、各类兴趣点(point of interest,POI)的密度分布相似,均呈中心高四周低的分布态势,而植物界面变化剧烈程度、天空可视因子、植被可视因子、交通标识在图像中的占比、机动车道路在图像中的占比分布相反。本文研究揭示了哈尔滨城市街道景观织补理论特征的分布和内在关系,丰富了景观织补理论研究体系,以期为城市视角下街道景观织补策略提供一定思路。
文摘Purpose–This paper aims to use activefine lane management methods to solve the problem of congestion in a weaving area and provide theoretical and technical support for traffic control under the environment of intelligent connected vehicles(ICVs)in the future.Design/methodology/approach–By analyzing the traffic capacities and traffic behaviors of domestic and foreign weaving areas and combining them withfield investigation,the paper proposes the active andfine lane management methods for ICVs to optimal driving behavior in a weaving area.The VISSIM simulation of trafficflow vehicle driving behavior in weaving areas of urban expressways was performed using research data.The influence of lane-changing in advance on the weaving area was evaluated and a conflict avoidance area was established in the weaving area.The activefine lane management methods applied to a weaving area were verified for different scenarios.Findings–The results of the study indicate that ICVs complete their lane changes before they reach a weaving area,their time in the weaving area does not exceed the specified time and the delay of vehicles that pass through the weaving area decreases.Originality/value–Based on the vehicle group behavior,this paper conducts a simulation study on the active traffic management control-oriented to ICVs.The research results can optimize the management of lanes,improve the traffic capacity of a weaving area and mitigate traffic congestion on expressways.
