我国城市智能交通经过几十年的发展，已经建设了较为完善的软硬件基础设施，城市智能交通正向着与交通新型基础设施相结合的网联化方向发展。城市智能交通系统属于复杂信息系统，架构是城市交通系统构建的基石，关系到系统内多层级业务关系、多流程数据流的稳定，是城市交通系统成功的必要前提。本论文对以往城市智能交通的作用和现状、发展面临的主要问题进行分析，研究基于新基建的城市智能交通架构与项目实践。 分析了美欧日与中国智能交通系统体系架构的发展历程、体系结构和发展趋势，从用户服务、逻辑架构、物理架构等三个维度进行对比分析，研究并提出基于新基建的城市智能交通架构研究方法、技术路线和研究步骤。 采用结构分析方法，从用户需求分析出发，明确各项用户服务内容及功能，建立城市智能交通系统体系逻辑框架和物理框架，总结其中关键技术，研究解决方案。在逻辑框架搭建上，采用面向过程的方法搭建逻辑框架，在逻辑层面分析总结用户服务内容、过程及功能实现形成功能层次表，以信息为要点形成各项功能数据流图和数据流描述表；在物理框架搭建上，将逻辑元素信息重新组合，将逻辑框架中信息数据流的逻辑起点和终点信息，转化为对应的物理硬件设备和软件模块，将逻辑元素转化为物理元素功能，形成各项物理框架流图和描述表，明确各项用户服务功能的物理实现；然后按照交通上通常的归类方式，将物理逻辑框架归类划分为车、路、云三个子系统，并从工程实现的角度，对各子系统物理设备和软件的功能归纳总结，设计出各子系统初步方案，最后分析凝练出具有明确功能和相应指标约束的技术集合，用于支撑车道级管控、重点车辆管理、智能交通诱导、特殊路段管理、应急处置调度、全息路口、路况信息服务、公共交通信息服务、车路协同应用、自动驾驶支持十项创新服务。 将本论文中架构等研究成果应用于衡阳市智能网联汽车（5G智能交通）设计项目，包括车路云各子系统的组成和作用，创新服务的实现过程及功能等。研究并总结基于新基建的城市智能交通系统与传统交通系统在交通感知、分析、管控等方面的优势，能够适应不同等级智能化建设需求，同时可赋能智慧交通、智慧城市建设。

After decades of development, China‘s urban intelligent transportation has built a more complete hardware and software infrastructure, and urban intelligent transportation is developing toward the direction of network connectivity combined with new infrastructure of transportation. Urban intelligent transportation system belongs to complex information system, and the architecture is the cornerstone of urban transportation system construction, which is related to the stability of multi-level business relationship and multi-process data flow within the system, and is a necessary prerequisite for the success of urban transportation system. This thesis analyzes the role and status of previous urban intelligent transportation and the main problems faced by its development, research on urban intelligent road traffic framework based on new infrastructure and project practice.We analyze the development history, framework and development trend of intelligent transportation system framework in the U.S., Europe, Japan and China, compare and analyze from three dimensions, such as user service, logical framework and physical framework, and study and propose the research method, technical route and research steps of urban intelligent transportation framework based on new infrastructure.Using the structural analysis method, we start from the analysis of user requirements, clarify the content and functions of each user service, establish the logical framework and physical framework of the urban intelligent transportation system, summarize the key technologies and study the solutions. In the logical framework, the process-oriented approach is used to build the logical framework, and the content, process and function of user services are analyzed and summarized at the logical level to form a functional hierarchy table, and the information is used as the main point to form each functional data flow diagram and data flow description table; in the physical framework, the information of logical elements is recombined, and the logical starting and ending information of information data flow in the logical framework is transformed into the corresponding The logical elements are transformed into physical hardware equipment and software modules, and the logical elements are transformed into physical element functions, forming various physical framework flow diagrams and description tables, and clarifying the physical realization of various user service functions; then, according to the usual categorization in transportation, the physical logical framework is categorized into three subsystems: vehicle, road, and cloud, and from the perspective of engineering realization, the functions of physical equipment and software of each subsystem are summarized and summarized, and the preliminary scheme of each subsystem is designed. The preliminary scheme of each subsystem is summarized from the perspective of engineering implementation, and the preliminary scheme of each subsystem is designed. Finally, the technical collection with clear functions and corresponding index constraints is analyzed and condensed, which is used to support ten innovative services of lane level control, key vehicle management, intelligent traffic guidance, special roadway management, emergency disposal dispatch, holographic intersection, road condition information service, public transportation information service, vehicle-road cooperation application, and automatic driving support.Apply the research results such as architecture in this thesis to the design project of the Hengyang Intelligent Networked Vehicle （5G Intelligent Transportation）, including the composition and role of each subsystem of vehicle-road cloud, the process of implementing innovative services and functions, etc. Research and summarize the advantages of urban intelligent transportation system based on new infrastructure and traditional transportation system in terms of traffic sensing, analysis and control, which can adapt to different levels of intelligent construction needs, and at the same time can empower the construction of Intelligent Transportation and Intelligent City.