基于实时路况数据的潮汐交通路段提取     

《地理空间信息》2017,(3)

发现潮汐交通产生的空间位置是解决潮汐交通问题的前提。以北京市四环内为研究区,基于实时路况数据,根据路段双向交通拥堵度和前后时间片交通拥堵度的数量关系,提出了潮汐交通的判断准则,从而提取潮汐交通路段。研究发现,潮汐交通路段主要分布在二环至三环和三环至四环间的区域,二环内分布较少,且主要在环路之间的连接线上,符合居民出行特征。  相似文献   

利用出租车轨迹数据估计城市道路拥堵状况     

张俊涛  李志勇  张浩  裴洪星  行瑞星 《测绘工程》2016,25(9)

交通拥堵是当代各大城市普遍面临的问题,如何通过各种技术手段发现城市交通的易拥堵路段并予以改善是城市交通相关部门以及学者关心的一个问题。通过各种GPS设备产生的历史轨迹数据对城市的研究逐渐受到重视,且取得一定的进展。文中总结运行车辆的4种通行状态:正常行驶、停靠/停泊、信号灯等待以及拥堵,分析这4种状态下运行车辆的速度特征,定义轨迹段平均速度和轨迹段速度方差两个数字特征用来描述运行车辆轨迹段的速度特征以及描述路段拥堵程度的拥堵指数,提出一种基于轨迹分段的拥堵检测的可视化方法,通过实验验证发现其可以较好地估计城市交通拥堵状况。  相似文献   

视角     

《湖南地质》2011,(8):8-9

7月23日午夜12点过后。200余位温州市民自发前往温州血液中心献血。整个大厅都挤满了市民。队伍已经排到了血液中心门口，导致中心门口交通拥堵。  相似文献   

Spatial analysis of commuting mode choice in Guangzhou, China   总被引：1，自引：0，他引：1  

Suhong Zhou  Lifang Deng  Meiyu Huang 《中国地理科学(英文版)》2013,23(3):353-364

Metropolitan cities in China are commonly confronted with unresolved traffic congestion issues, primarily due to rapidly increasing traffic demand. Group disparity between commuting mode choice and its spatial distribution on road networks has enabled us to examine the factors that give rise to the discrepancies and the fundamental spatial causes of traffic congestion. In recent years, micro-perspective, individual, and behavior-based spatial analysis have mushroomed and been facilitated with effective tools such as temporal geographic information systems (T-GIS). It is difficult to study the interrelations between transport and space on the basis of commuting mode choice since the mode choice data are invisible in a specific space such as a particular road network. Therefore, in the field of transport, the classical origin destination (OD) four-stage model (FSM) is usually employed to calculate data when studying commuting mode choice. Based on the relative principles of T-GIS and the platform of ArcGIS, this paper considers Guangzhou as a case study and develops a spatio-temporal tool to examine the daily activities of residents. Meanwhile, the traffic volume distribution in rush hours, which was analyzed according to commuting modes and how they were reflected in the road network, was scrutinized with data extracted from travel diaries. Moreover, efforts were made to explain the relationship between traffic demand and urban spatial structure. Based on the investigation, this research indicates that traffic volumes in divergent groups and on the road networks is driven by: 1) the socio-economic characteristics of travelers; 2) a jobs-housing imbalance under suburbanization; 3) differences in the spatial supply of transport modes; 4) the remains of the Danwei (work unit) system and market development in China; and 5) the transition of urban spatial structure and other factors.  相似文献   

基于互联网地图的矢量路况数据生成与应用方法研究     

何小波  罗跃  金贤锋  贾亚辉  韩维喆 《地理信息世界》2021,28(6):53-58

城市交通路况数据对交通治理、交通拥堵预测等研究具有重要意义,针对常规交通路况数据获取成本高、难度大等问题,本文提出一种基于互联网地图的矢量路况数据生成与分析方法.该方法通过互联网地图提供的实时路况信息,利用网络抓取、GIS空间数据处理和图像识别等技术,将互联网实时路况瓦片数据自动化处理成矢量路况数据,便于交通运行特征分析.最后以重庆主城内环范围为例,基于百度地图实时路况自动生成不同时间段的矢量路况数据,利用此数据进行出行时空特征分析.实验证明该方法具有可操作性、通用性和有效性.  相似文献   

地下交通联系通道的发展历程与展望     

朱江 《中国勘察设计》2014,(12):53-55

文通拥堵是当今城市发展所面临的普遍难题。建设地下交通设施、构建立体化交通体系,是缓解交通拥堵的重要手段之一,因此,地下交通空间的利用和开发建设越来越受到各地重视。本文结合北京市近几年城市地下交通联系通道的设计与建设,重点论述地下交通联系通道的发展历程,并展望了地下交通联系通道在未来城市发展建设过程中的应用前景。  相似文献