Research On The Programing Of The Road Network Under Transit Priority

With the rapid development of city economy and city expansion in China,the development of public transportation lags far behind city traffic,and results in a rapid increasing of car purchasing demands.The finite road resources cannot meet the annual average growth rate in 20%of the country and cause traffic congestion,accident and parking problems.Although city policy-makers and planners continue to increase the infrastructure and improve the road environment.the effect is finite,and the proportion of private motor vehicles remains high.The development of city traffic depends on the layout of the city road network.The reasonable road network layout can improve people travel habits effectively and guide to choose suitable transportation modes for different trip purposes.At the same time,it is more conducive to the harmonious development between cars,public transportation and slow traffic.City road network is a general term for roads with different functions and different grades.To determine the reasonable layout of the city road.it is necessary to analyze and study the local road network in the region.This research is to analyze the city road network step by step based on the transit priority.Because the classification of roads is the basis for city road network study to build high quality,high efficiency and high level of city traffic.This study first compares and analyzes the construction of city road network by the domestic and foreign literature.Secondly,to analyze the function and grade demand in different forms in the road cross section with limited transit right,and establish the banding corridor.At the same time,to ensure the safety and continuity of different transportation mode,this study pairs and analyzes the function of the adjacent corridor.The cross combination of different corridors can form diverse road network,influenced by land use.transportation mode and other factors.Then it can reverse the travel demand and land function.Therefore,the efficient and reasonable layout of the road network can coordinate the travel demands of various transportation modes and meet the diverse function use.Finally,to combine with the current demand for traffic development and propose a new classification of city road grade lays the foundation for the research of road cross section planning and road network,to provide the reference basis for city road planning and designers.