In order to satisfy the function demand of expressway traffic safety networked joint control

an expressway road network model is proposed

which is suitable for data presentation and operation. The model is constructed based on hierarchical topology network elements with landmark as a minimum size of the road network model partitions. The lanes are described precisely

and road network modeling units could be combined into abstract network according to different traffic demands. The model is composed by 6 parts including arc

arcnode

segment

segmentnode

lane and laneconnector

which could be used to describe the highway road network topology carefully. This model is tested in the emergency response of expressway by using the common section of Shen Hai expressway and ShanghaiShanxi expressway as a testing section

the result shows the model could satisfy traffic safety management demands effectively.