Research On Channelization And Traffic Control Of Malformation Intersections In Mountain City

In mountain cities, the flat curves and vertical curves of urban roads are complex than theplains. Additionally, structures of roads in mountain cities are always irrational.On theseconditions, there are often a large number of malformation intersections,which manychannelization and control methods applicable to common intersection can not be directlyapplied to. These malformation intersections are probably become traffic accidents and trafficcongestion multiple points in the road network if they can not be treated properly. A set ofintegrate channelization and traffic control methods against various types of abnormalmountain city intersections are presented,based on in-depth research of the mountain citytraffic features.The characteristics of the road network, traffic flow, residents travel features,andmalformation intersection of the mountain city are studied in details. According to the crossingangle,import numbers and curves, malformation intersections in the mountain city are dividedinto six types that are Y-shaped intersection, X-shaped intersection, H-shaped intersection,multi-way intersection, offset intersection and intersection with sinuous import lanes. Everytypes of abnormal intersection are defined, and the traffic problems of each type of analysisneeds to focus on resolving the intersection abnormal.Traffic problems need to be focused onof each type of the malformation intersections are also analyzed.The methods of channelizatio for intersections are summarized under six main categories astraffic islands, driveways function, expanding import lanes, waiting area, guide wire and theorganization for left-turning vehicles. Suitable methods and focus of each class ofmalformation intersection are proposed, according to the geometric characteristics and trafficproblems.Intersection control and selection are studied and the signal control classification, the mainparameters and evaluation are analyzed. On this basis,applicable control methods to all types ofmountainous city malformation intersections are proposed combined with the channelization,and the applicable conditions for these methods are also analyzed.The channelization and control methods are used to improve the typical cases selectd foreach type of malformation intersections. The applicability and effectiveness of the proposedmethods are validated by analyzing and comparing the simulation results of intersection timeoptimization software synchro and microscopic traffic simulation software VISSIM.