Research Of GIS Methods On Road Alignment And Evaluating Of Urban Road Network Planning

Since reform and opening-up, the sustained and rapid development of national economy, the demand of road transportation increases rapidly, the infrastructure construction of the road is flourishing thereupon too. The design department of the road meet the unprecedented opportunity for development, otherwise the severe test for them at the same time. How to finish the design task within shorter time, and the solution is the most optimal in economy, rational in layout and passing through smoothly. Computer aid road alignment can give this support for professional road designer, the computer can offer road designer more integrated preparing of design material. at the same time, Computer Aid Design(CAD) makes the thought of the road design swift becoming the drawing by which can be performed. On the other hand, the computer has the ability to synthetically and fast analyze data, so the economy of the road design can be appraised more roundly by it. In this paper, we proposed a computer aid road alignment based on Geography Information System(GIS), which is an experiment of utilizing the computer to aid road design swiftly. And in addition, according to current situation of city road network sack digital appraising. We propose a model to appraise urban planning road network, in which road network density, road network area density and traffic accessibility are main evaluation index. The main content of this paper includes: â‘ Current situation survey about computer aid road alignment research, it is mainly focus on overall synthesis and analysis about the achievement, hotspot and developing direction of research. â‘¡The road alignment theory based on geographical information system. The influence factors of the road alignment and design limiting conditions is analyzed, and a kind of road alignment method is proposed to synthetically consider these influence factors.â‘¢The program realization and instance analysis of computer aid road alignment theory , in which makes use of computer program language to realize the space analysis needed in the theory, and utilize the program to design the road in a plot is told. â‘£Proposing and realizing an appraise models for road network of the urban planning , A calculation method about density of road network , density of road network area and traffic accessibility is put forward ,and is achieved by computer.. otherwise utilize the program to appraise and analyze a real planning road network.