| The interchange on the highway is"throat"of important road, because it assumes the role of vehicle conversion and stimulates the area economic.That the interchange layout is wise or not relates to the function of interchange, economy investment and reasonable forthputting derectly. After the research of plan about interchange in states, I advance some useful suggest about plan and function of RDI (regionally distributed interchange).RDI is defined as that some interchange distributes with each other with interference coefficient between 0 and 0.5 in the attractive scope according to interchange spacing and influence. Researching the traffic characteristics of RDI, I classify RDI and analyse influence of sorts. As to linear RDI, after analysing element that affectes plan of RDI such as interchange spacing, selecting split or compound interchange and important technology is analysed. As to surface RDI, I search the shortest path of RDI with Balance-distribution-method, which is used as optimizing ramp and designing interchange. As to the shortest path, 2 objects (spending and traveling time) are considered, so it is multi-objective shortest path. The algorithm that is a combination of a k-shortest path algorithm and a multi-objective lattice-order decision-making method is much better than the algorithm of Dijstra. At the same time, according to the research of function and plan of RDI, some research about key technologies and layout program of RDI is proposed.At last, according to the analysis of ZouMa, JinFeng, HanGu interchange in beltway's highway in ChongQing, theme of RDI is appropriate after testing. |
