Modeling the Overpasses in Multi-dimensional Traffic Network

Transportation network data is complex since it is often multi-model and multi-dimensional. Though there are various road network models, their traditional road network structures, unfortunately, do not solve the problem well. Therefore this paper firstly proposes a feature-based data model with three level structures. Secondly, after analyzing the benefit and deficiency of existent strategies of expanding on the traditional node-arc model to solve the planar network problem, this paper then puts forward a concept model of overpasses. And a method of integrating GDF with the proposed model is given.