中文摘要：

为了提高交通信息系统的集成化水平，研究了交通状态信息语义的准确理解，提出了一种基于本体的交通状态信息统一语义理解机制。该机制引入了数据登记簿制度和利用了本体的语义表达能力，因而能够解决在交通信息系统建设中因缺乏统一规划与协调导致交通信息系统集成化水平较低，无法广泛实现智能交通系统子系统间信息共享和重用的问题。为了验证该机制的正确性与有效性，构建了交通状态信息云服务平台及其子模块——交通事件管理语义检索系统。平台示范表明，该机制可用于智能交通系统海量多源多维交通状态信息的理解与交互，对我国交通系统的信息化建设具有参考与应用价值。

英文摘要：

To improve the integration level of traffic information systems, the subject on correct semantic understanding of traffic state information was studied, and a mechanism for achieving the unified semantic understanding of traffic state intbrmation based on ontology was proposed. The mechanism intoduces the data registry to strengthen the data share and makes use of the ontology＇ s semantic expression, so it can overcome the current problem that traffic information systems＇ integration level is relatively low and intelligent transport systems＇ information sharing and reuse cannot be widely implemented owing to the lack of unified planning and coordination in construction of traffic information systems. In order to verify the correctness and effectiveness of the mechanism, a cloud platform for traffic state information and its sub-module, the traffic incident management semantic retrieval system, were built. The application demanstration shows that the research results are applicable in intelligent transportation systems, and can promote understanding and interaction for massive multi-source and multi-dimensional traffic state information. Therefore ,the proposed mechanism has the application and reference values to the information construction process of china＇ s transportation systems.