Application of Dynamic Route Selection Model in Urban Transportation Distribution

Based on studies and analysis of route selection model, modified road network model is brought forward by taking account of the particularity of route. And not like traditional methods using many virtual links and nodes to express every turning in intersections, modified road network shows them as road network data. Because only accessibility in traffic behavior can meet demand of route optimization, to achieve better efficiency enhancement, the solution that road network data and topological structure are separated in physics and combined in logic is proposed. Corresponding expressive way is given for different categories of nodes in modified road network model and double-layer road networks are used if itpsilas a large network. Finally, a thought that penalty value could be used to prevent Braess phenomenon is put forward. Moreover, a test is also done to a little road network by using multi-router algorithm and an optimization route is found out.