Abstract: A simulation road network model for intelligent transportation system has been proposed. Compared with the traditional road network model, this model enhances the geometric expression and topological expression ability. At the same time, it can attach rich traffic attribute data to meet the refined needs of intelligent traffic simulation. On this basis, a road network data migration method is studied, which quickly extracts and constructs a road network for intelligent transportation systems from existing electronic maps. Tests on geometric accuracy, topological completeness and modeling efficiency show that the road network model and its modeling method improve the efficiency of traffic simulation basic road network modeling, reduce the modeling cost, and provide an efficient and reliable road data source for the wide application of intelligent traffic simulation.

Key words: intelligent transportation system, road network modeling, electronic map, data migration