共查询到18条相似文献,搜索用时 687 毫秒
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《电子技术与软件工程》2016,(3)
在城市化的今天,教育、交通、医疗等方面的资源日益紧缺。其中交通资源使用率很大程度上受到路口交通灯时间配置的影响。交通灯最初的目的是确保行人和车辆的安全,但是作为代价车辆和行人的通行效率大打折扣。如何确定交通灯的时间,提高通行效率,使交通信号等能够智能起来,是交通部门需要重点关注的问题。 相似文献
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随着私家车的不断增加,传统的交通控制系统已经不能满足路口交通的需要,因此,交通控制系统正朝着智能化、低成本化方向不断发展。文章完成了以STC89C51单片机为控制核心的十字路口交通控制系统,该系统相比于传统交通系统,除了包括车辆信号灯指示模块、人行道通行指示灯模块、计时模块以外,还包括了紧急按键模块、通行时间加减模块、红外遥控模块、行人闯红灯报警模块。除了能简洁、直观地显示十字路口的通行规则,提高车辆和行人的通行效率外,系统还具有一定的可扩展性,将进一步提高十字路口的交通安全和通行效率。 相似文献
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关于智慧交通的研究已经开展了很多年,但是关于全息路口的研究尚在起步阶段。文章研究了全息路口的基本原理、建设标准及其在交通管理中的应用,并结合具体的案例,阐述了利用全息路口解决交通路口实际问题的思路。全息路口技术能将路口的机动车、非机动车、行人、路口标志和具体道路渠化以数字的形式收集、分析、研判,切实减少了路口的交通冲突,提高了道路通行效率,在大数据时代的交通管理中发挥了重要作用。 相似文献
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<正> 为确保车辆、行人安全有序地通过城市十字交叉路口,在路口都设有交通指挥信号灯。本文介绍一种线路简单、成本低、可靠性高、体积小、寿命长的全电子指挥信号灯控制器,它可以直接用来取代传统的体积笨重、耗电量大的电磁继电器式控制器。 该控制器的工作程序如下:红灯亮30~60s(表示人、车停行信号),黄灯闪亮1~5s(表示预备通行或停行信号),绿灯亮30~60s(表 相似文献
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应用图像处理技术,研究了PLC交通信号灯控制系统,发现交通信号灯亮的时间长度可以通过检测到的车辆运行信息控制,这表明将传统的路口四相位扩展到十二相位,能够充分利用传统信号灯控制系统中的空等待时间,在不改变路况的现有条件下,有效提高路口车辆的通行效率。 相似文献
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针对交通十字路口等视野盲区往来行人间存在遮挡情况,如何高效准确地检测复杂道路中目标行人具有实际意义。为了实现夜间交汇路口场景行人检测,提出一种基于改进YOLOv5的行人目标检测算法,采用Non local和PSA模块对YOLOv5原网络的Bottleneck CSP进行改进,能够有效弥补遮挡中行人特征的帧间信息交互过程,增强长程范围通道特征依赖关系。设计更深的160×160检测层和自适应anthor,提升夜间行人检测的边界回归精确度。实验结果表明,针对夜间下交通路口场景,压缩改进后模型对行人检测鲁棒性高,相较于原始算法mAP_0.5和mAP_0.5:0.95值分别提升了14.2和12.7,说明所提算法对夜间行人检测的有效性。 相似文献
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城市路网连接用地,亦是车辆运行的载体,是控制交通噪声的关键所在。本文基于仿真模拟,重点探讨路网间距通过影响交通通行状态,进而影响交通噪声的规律。首先,选取某研究路段,由交通微观仿真得到逐个车辆运行的实时数据;而后由单车噪声排放模型及噪声传播模型完成动态交通噪声模拟,获取噪声指标,并经由实测验证;最后,在交通微观仿真模型中,对研究路段中间增加垂向道路以减小路网间距,并改变其交通量,获得多场景的动态交通噪声模拟数据。通过数据对比,可知路口间距减小对交通噪声的影响,与垂向道路的交通状况有密切关系。随垂向道路的交通量增大,路口间距减小会使连续等效A声级及噪声峰值增大,且存在最高值,而噪声平均值和噪声背景值会减小。研究可在设计阶段为城市路网规划提供参考,改善人居环境。 相似文献
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关于交通信号灯时长如何合理设置的问题,一般应考虑两个基本因素:车流量和通行距离.为了实现在设定路口最大限度地通过最多的车辆,需要进行合理的研究.本文运用层次分析法建立简单的数学模型,针对沈阳市青年大街路段交通信号灯设置时长的问题进行了初步的分析,并从数值结果的角度提出了一些合理的建议. 相似文献
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In vehicle Ad-hoc netwok (VANET), traffic load is often unevenly distributed among access points (APs). Such load imbalance hampers the network from fully utilizing the network capacity. To alleviate such imbalance, the paper introduces a novel pricing game model. The research scene is at the intersection when the traffic light is green. As vehicles are highly mobile and the network typology changes dynamically, the paper divides the green light time into equal slots and calculates APs’ prices with the presented pricing game in each time slot. The whole process is a repeated game model. The final equilibrium solution set is APs’ pricing strategy, and the paper claim that this equilibrium solution set can affect vehicles’ selection and ensure APs’ load-balancing. Simulation results based on a realistic vehicular traffic model demonstrate the effectiveness of the game method. 相似文献
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《Vehicular Technology, IEEE Transactions on》1972,21(3):77-91
A new concept of urban transportation in which vehicles are operated on a computer-guided road network is presently being evolved. Such a system, in miniature, was demonstrated at the Automobile Pavilion at Expo'70, which was held in Japan. The "traffic game" is played on a 25-by 25-m chessboard-like field where visitors can drive two-passenger cars. The cars are individually controlled by a computer in the control center, in contrast to conventional traffic systems. The control system guides the cars to their destination, prevents accidents, and controls cars in emergencies. It fullfils the functions which are important in a future urban traffic-control system. The system gives passengers driving freedom to preserve driving pleasure. The system successfully demonstrated the advantages of an individually controlled vehicle system for future urban traffic to many visitors to the Expo. In designing this traffic game system, there were discussions on a number of problems which are likely to arise during its implementation on a large scale. 相似文献
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为了提高交叉口群的运行效率,以改进的TACOS模型为基础,提出了适应过饱和状态下交通流动态变化的自适应控制策略。该方法以交叉口的关键路径通过最大车辆和平均排队长度最小为目标,实时优化相位放行方案,并根据最大排队长度的车流方向放行绿灯进行实时控制。利用Vissim中VisVAP模块对过饱和交叉口群自适应控制策略进行多项指标评价分析,并与定时控制相比较。结果表明,该控制方法可有效降低车辆平均等待时间和车均延误,提高通行能力。 相似文献
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为降低夜间行车导致交通事故的概率,在能见度不理想的行车环境中为车辆提供主动安全系统,依据汽车辅助驾驶系统的基本要求,基于远红外传感技术,设计出夜间行人辅助模型。该模型通过远红外传感器来捕捉原始的数据源,利用灰度统计技术获取ROIs,构造出多尺度概率模板,在此基础上对数据源进行匹配检测,通过多帧校验综合处理技术将模型的漏检率和检测率进一步改善。实验表明,该模型的概率模板在匹配精度上相对于业内常用方法有了较大程度的改善,此外该模型还能够在郊区和市区两种交通路况下使用,实用性较好。 相似文献
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Gokhan Budan Khaled Hayatleh Denise Morrey Peter Ball Philip Shadbolt 《Analog Integrated Circuits and Signal Processing》2018,95(3):415-422
Intersection control has an important role in the management of urban traffic to ensure safety, high traffic flow and to prevent congestion. Recently, a growing body of literature has been reported on the theme of non-signalised intersection control in which traffic lights are replaced with intelligent road side units. Data from several studies suggest that non-signalised control could reduce vehicle delays and fuel consumption significantly whilst ensuring safety. However, there is little published data on the impact of the mixed driving behaviour with human-driven vehicles and autonomous vehicles. This paper investigates the emerging role of connectivity and vehicle autonomy in the context of traffic control under the mixed driving behaviour scenario. The concepts of vehicle-to-infrastructure (V2I) communications and multi-agent systems are central to achieving a robust and reliable traffic-light-free intersection control. Comprehensive computer simulation results on a four-way intersection indicate over 96% reduced average vehicle delay and 37% less fuel consumption with the non-signalised control solution compared to the traffic light control. The outcome of this study offers some important insights into enabling cooperation between vehicles and traffic infrastructure via V2I communications, in order to make more efficient real-time decisions about traffic conditions, whilst ensuring a higher degree of safety. 相似文献