上海大连路隧道将成为中国首条5G跨江隧道

正近日,在"国务院国资委与上海市政府深化合作共同推进落实国家战略签约仪式"上,上海隧道工程股份有限公司与中国联通签署战略合作协议,双方表示,将跨界合作,共同开创5G时代智能交通、智慧城市,建设新未来。大连路隧道将成为中国联通与隧道股份联手合作、打造智慧城市基础设施的试点样板之一,也将成为中国首条5G跨江隧道。     

“构建具有中国特色的新一代城市智能交通系统”——访中国智能交通协会理事长吴忠泽

城市智能交通的发展,不仅是现代城市建设发展的重要内容,也为新技术产业提供了发展的空间。新一代宽带移动通信、下一代互联网、泛在网络、智能终端等在城市交通中都具有广阔应用前景,城市交通为战略性新兴产业提供了广阔的市场环境。针对城市智能交通的未来发展,中国智能交通协会理事长吴忠泽认为,立足国情、运用新技术手段,结合智慧城市建设,构建具有中国特色的新一代城市智能交通系统,将是我国城市智能交通发展的重要方向。     

可持续发展服务型智慧化公路交通研究

随着我国交通基础建设的日益完善与发展,我国公路交通的布局逐渐形成了以城市为节点,以公路为网线而逐个连接起来的网状式公路交通系统.随着信息化与人口素质等的发展,我国对于城镇智能化的需求日趋明显,因而对于智慧交通的需求也愈发明显.本文通过总结世界道路的发展简史并结合当前信息技术的普及与城镇智能化的提出,科学性地预测出了未来智慧公路的服务走向,并给出了有关未来智慧公路服务模式的合理的发展建议.分析表明,未来的公路交通将智慧性融合人、车、路三方,最终实现智慧一体化的高效率公路交通系统.     

史其信:车联网促卫星导航发展

在后金融危机时代,世界各国正在进行抢占科技制高点的竞赛,全球进入空前的创新密集和产业振兴时代。作为新兴产业和科技创新的代表,物联网成为经济危机后期国际竞争的制高点,从"智慧地球"到"感知中国"都体现出决策者对物联网的高度重视。我国政府将物联网应用的重点领域确定在环境监控、物品溯源、智能电网和智能交通等领域,其中,以"车联网"为代表的下一代智能交通系统成为国家     

智慧道钉在高速公路上的应用

文章介绍了智慧道钉的组成结构、系统原理,并通过南宁沙井至吴圩高速公路上智慧道钉的实际应用,验证了有效部署智慧道钉,可以全面感知道路交通与环境状况、提供精准行车导引功能及软隔离,对异常交通行为、交通事件检测、定位与告警,还可进行公路智能养护预警。智慧高速公路运营单位可利用这些交通流信息来改善交通管理、提升交通安全。     

交通强国背景下智慧交通发展展望

为了加速发展智慧交通,就当前我国智慧交通的发展现状及国家对智慧交通发展的政策文件做一定阐述,在人工智能、环境感知系统、高精矢量地图、智慧公路、大数据安全等方面的重要性做分析,明确智慧交通未来的发展目标方向,以便满足我国智慧交通的发展需求。     

智能汽车与智慧交通产业创新示范区在京成立

正2016年1月18日,"智能汽车与智慧交通产业创新示范区"成立发布会在北京经济技术开发区举办,工信部、北京市、河北省共同签订"基于宽带移动互联网的智能汽车与智慧交通应用示范"框架合作协议,15家企事业单位发起设立"智能汽车与智慧交通产业联合创新中心",4家企业发起设立北京未来车联网创新基金。据了解,创新中心将通过在北京经济技术开发区应用示范建设,突破与沉淀一批智能汽车与     

国内城市智慧交通发展探讨

智慧交通是充分融合了智能交通与数字化交通的一种更为高级的现代城市交通模式。文章基于国内城市交通发展实际需求,分析了物联网技术背景下的城市智慧交通发展现状,并从智能化新技术装备以及信息化应用管理系统等方面提出了智慧交通建设发展的新思路。     

基于分布式计算机的智能相机在城市交通中的研究与应用

我国逐步开始将城市建设与互联网技术进行高度融合以打造智能城市。智能城市建设过程中,智能交通是重要一环,当前我国交通视频监控系统普遍是通过道路两旁的摄像头拍摄获得路况图像信息,这种方式虽然是解决了一些问题,但是不能满足智能城市的建设需求。本文总结和研究了分布式智能相机的一些关键技术,得出嵌入式设备高效率、低耗能的优点使其在交通监控领域得到了越来越广泛的应用,基于分布式计算机设计了智能相机的分布式智能城市交通系统,提出了一系列有益于提升系统运行的具有应用前景的算法,用来解决使用重叠视野进行跟踪和稀疏相机网络中的有效跟踪。     

上海申通地铁集团与商汤科技签署战略合作意向

正近日,上海申通地铁集团有限公司与商汤科技(Sense Time)在沪签署战略合作意向,并共同揭牌"上海轨道交通智慧视觉联合实验室"。双方将本着"合作发展、互利共赢"的原则,共同推进城市轨道交通产业智能升级,为城市精细化管理做出贡献。根据协议,申通集团与商汤科技将围绕建设"智慧上海"、"智慧地铁"的发展战略,以上海轨     

城市主要道路平面交叉口安全管理方法

文章基于现今城市干道平面交叉口交通流量密集的状况,分析讨论影响平面交叉口安全管理的因素,提出了交叉口安全管理方法和一些改进措施,为提高城市道路交叉口的交通安全管理提供依据。     

低碳经济背景下河谷型城市交通级配体系研究

文章针对交通方式的合理比例分配问题,提出了交通级配的概念,构建了城市交通级配体系,并基于对西部河谷型城市道路网络特征的分析,以兰州市为例,提出了相应的交通管理措施,为城市绿色交通建设的实现提供方法借鉴。     

Analyzing spatiotemporal traffic line source emissions based on massive didi online car-hailing service data

Nowadays, the massive car-hailing data has become a popular source for analyzing traffic operation and road congestion status, which unfortunately has seldom been extended to capture detailed on-road traffic emissions. This study aims to investigate the relationship between road traffic emissions and the related built environment factors, as well as land uses. The Computer Program to Calculate Emissions from Road Transport (COPERT) model from European Environment Agency (EEA) was introduced to estimate the 24-h NOx emission pattern of road segments with the parameters extracted from Didi massive trajectory data. Then, the temporal Fuzzy C-Means (FCM) Clustering was used to classify road segments based on the 24-h emission rates, while Geographical Detector and MORAN’s I were introduced to verify the impact of built environment on line source emissions and the similarity of emissions generated from the nearby road segments. As a result, the spatial autoregressive moving average (SARMA) regression model was incorporated to assess the impact of selected built environment factors on the road segment emission rate based on the probabilistic results from FCM. It was found that short road length, being close to city center, high density of bus stations, more ramps nearby and high proportion of residential or commercial land would substantially increase the emission rate. Finally, the 24-h atmospheric NO₂ concentrations were obtained from the environmental monitor stations, to calculate the time variational trend by comparing with the line source traffic emissions, which to some extent explains the contribution of on-road traffic to the overall atmospheric pollution. Result of this study could guide urban planning, so as to avoid transportation related built environment attributes which may contribute to serious atmospheric environment pollutions.     

Tackling traffic congestion in Accra,Ghana: A road user's perspective

A fast emerging component of the urban transportation problem in cities of the Third World is the problem of traffic congestion. Rapid increases in car ownership coupled with poor land use planning, inadequate road space, lack of regulated parking systems, uneducated use of the road by pedestrians, and bad driving behavior of motorists have all combined to produce congestions comparable to those experienced in cities in the advanced parts of the world. Traffic management measures have been tried in some of the major cities such as road expansion and redistribution of land uses in city centers, but most have produced minimal results. It is recommended in this paper that city authorities adopt an integrated approach to congestion with emphasis on influencing the behavior of the road users.     

Optimal deployment of charging lanes for electric vehicles in transportation networks

Given the rapid development of charging-while-driving technology, we envision that charging lanes for electric vehicles can be deployed in regional or even urban road networks in the future and thus attempt to optimize their deployment in this paper. We first develop a new user equilibrium model to describe the equilibrium flow distribution across a road network where charging lanes are deployed. Drivers of electric vehicles, when traveling between their origins and destinations, are assumed to select routes and decide battery recharging plans to minimize their trip times while ensuring to complete their trips without running out of charge. The battery recharging plan will dictate which charging lane to use, how long to charge and at what speed to operate an electric vehicle. The speed will affect the amount of energy recharged as well as travel time. With the established user equilibrium conditions, we further formulate the deployment of charging lanes as a mathematical program with complementarity constraints. Both the network equilibrium and design models are solved by effective solution algorithms and demonstrated with numerical examples.     

Ensemble based traffic light control for city zones using a reduced number of sensors

Rapid advances in computing, sensing and telecommunication technology offer unprecedented opportunities for artificial intelligence concepts to expand their applications in the field of traffic management and control. Our methodology gravitates around a powerful decision-making method: ensemble-based systems. This technique is used to accurately classify the near future traffic conditions and to make efficient decisions for adapting the traffic lights sequences within an urban area to optimize the traffic flows. The proposed approach requires only measurements provided by traffic sensors located along the principal roads entering the zone. This reduced number of sensors are considered to be enough relevant for classifying the near future state of the traffic and moreover, their measurements can be validated through analytical/hardware redundancy. Our methodology is meant to be implemented within the framework of a wireless sensor and actuator network and is confirmed by computer simulation, including normal or abnormal traffic conditions, for the central part of the city of Timisoara-Romania.     

广州市天河区交通拥堵的微循环解决路径研究

快速城市化致使城市交通量急剧增长,交通拥堵问题日益严重。受社会经济等条件限制,已建的成城区难以进行大规模的改扩工程,交通系统的深化急需跟上城市更新的步伐^[1]。本文以广州市天河区天园街道片区为研究对象,利用互联网电子地图,对该片区周边四条主要交通性道路高峰时段拥堵情况进行实时监测。通过为时一个月的监测,了解到在拥堵高峰时段四条交通性道路规模所能承载的交通量远远低于实际承载的交通通行量。结合实地调研,运用交通微循环理论,提出构建一个合理的交通微循环道路网络方案,即开放片区内部路网增强城市交通的毛细血管,增强四条主干道之间的联系实现交通分流。     

The power of reforming streets to boost access for human-scaled vehicles

This commentary argues for strategies to rapidly increase access by small, human-scaled modes in cities through changes to street designs. Such rapid transformations are necessary as part of responses to critical environmental, economic and public health challenges cities face. We explain that even though coordinated transport and land use planning is desirable, the built environment is mature and slow to change, while streets can and have changed in character and use frequently. This suggests that access to employment, amenities and services should be dramatically increased through reoriented street space toward human-scaled transport modes which will improve safety, reduce pollution, and save households and governments money. We then articulate the prospects of a new generation of accessibility research based on network evolution.     

广州市道路交通规划建设探讨

文章针对广州市道路系统规划的基本状况及存在的问题,结合国外城市道路交通规划建设及管理经验,提出了基于小尺度道路网、合理道路等级级配和快速路系统的城市道路交通规划建设优化措施及建议,为缓解城市交通拥堵提供理论依据。