Abstract: Existing road network modeling methods do not allow users to edit and modify the semantic dataset, such as building a new road, widening and narrowing a road, changing direction of one lane, changing connectivity between lanes, creating reversible lanes and so on. To address the above problems, in this paper, we present a semantic model of traffic networks allowing dynamic editing. We first analyzed the coupling relationship between normal roads and intersections and then presented a hierarchical semantic dataset, which comprises traditional Lane, intersection Lane, Link, Connection, Intersection and Road. After users provide the data of road axis lines, all of the above semantic data can be generated automatically. After dynamic editing and modification of road network traffic attributes, the dynamic updating of semantic data can be completed by decoupling and recalculating the semantics of corresponding road sections and connected intersections. Experimental results show that our model can generate semantic data of road networks efficiently and accurately. It also allows dynamic editing of the semantic data and can generate traffic phase automatically.

Key words: traffic simulation, road networks&rsquo, modeling, dynamic editing, hierarchical semantic