关键词: 交通系统仿真, 城市道路仿真模型, 异构数据源接口, 自动机理论

Abstract: Based on theories of automaton in the compiler principle，this paper presented the designing and programming algorithms of the interface of heterogeneous data source for urban road simulation model.Data exchange was through files.As an example of DXF source file，it established an automaton of the line entity，traced red information through state transition graph.At the same time，it also gave the class diagrams in UML（Unified Modeling Language） of static simulation models when they regenerated in target environment.The results indicate that automaton creates a new idea and method for traffic system modeling and makes urban foundational data source sharable and reusable.

Key words: traffic system simulation, urban road simulation model, interface of heterogeneous data source, automaton