Assessment on accessibility of regional comprehensive transport:A case study of Anhui
区域综合交通可达性评价——以安徽省为例

The authors evaluate the provincial accessibility,county accessibility,opening accessibility between adjoining districts,two fare costs and probability of attraction based on social and economic factors of districts in Anhui Province,point out spatial accessibility structure of diversified indexes of towns in this province,and build a model of comprehensive accessibility indexes,and achieve spatial structure of comprehensive accessibility of the towns.We find that spatial pattern of the towns in Anhui is taking Hefei as the center and extending toward edge by and large,but the spatial pattern does not constitute regular concentric circles;county analysis reflects distinct differences between south towns and north towns.Accessibility of south and southwest towns is bad and good in the north towns,respectively;the towns are identified as severe shrinkage,sharp expansion,substantial stabilization and fluctuation in the opening analysis;spatial structure of fare cost based on the shortest line forms circularities centered embayment towards northeast;analysis of the least fare cost testifies spatial structure of accessibility of the towns following with extension of railway network;attractive indexes of probability indicate that the towns with high attractive indexes of probability present a shape of "?";comprehensive accessibility indexes of the towns reveal symmetry between north and south in Anhui,but the pattern is broken by mountains of South Anhui.In the end,the researchers offer some proposals on some flaws of road network: promote new regional growth poles in north central Anhui for further strengthening their internal relations;accelerate the construction of high-grade highways in Huaibei plain,in particular strengthen lateral ties between the towns of North Jiangsu and South Henan provinces;extend connectivity of high grade roads in the northern and southern parts of Maanshan;improve the road facilities of the Wanjiang City Belt.