The Research On Evaluation Of The Selection Of Urban Road Overpass Scheme

With the rapid development of economy, urban traffic increase, bring a series ofproblems, which lies in the traffic jams, this has become a big sticking point of the urban. Andmore and more serious, The urban is under the operation of the network overload.Thenetworks of the problems of the largest plane cross, when a Conflict point appears problem, Itwill lead to serious congestion, stereo cross as a road traffic hub (intersection) of a high-levelform for network node to provide efficient conversion functions, play more and moreimportant role. According to the different methods of three-dimensional and intersecteddivision, it can be divided into many types, and each has its particular traffic service functionand characteristics. Relative to the plane cross speaking, three-dimensional and intersectedwith the formation of the Conflict point intersection avoid, reduce the delay, ensure trafficsafety, improve road traffic capacity, And the defect is required with a long cycle, capitalconstruction, high traffic go round the distance is long on road intersection traffic flowcharacteristics, characteristics, node type to choose the appropriate factors such asthree-dimensional and intersected form is very important. Based on the analysis of domesticand international interchange development history, the existing problems, and on the basis ofthe types of opposites in the reasonable classification, and kinds of the overpass type on thefeatures of the detailed analysis and comparison; The choice of the overpass type. This thesis isbased on the principle of urban overpass type selection as the foundation, combined with thevolume of traffic of the prediction, this thesis expounds the traffic environment condition,natural environmental conditions, and the social environment condition and landscapeaesthetics influence factors into the influence of the opposition selection. And it can raiseurban interchanges the general idea of selection. Combined with the overpass planningprocess design, made clear the selection principle, the factors of the interchanges, purpose,content and processes, and established a complete evaluation index system and gives eachindex quantification method, according to a three-dimensional and intersected selection forsome simple empirical analysis proves the scheme evaluation method is scientific andpractical.