The Evolution Pattern of City Accessibilities in Henan Highway Traffic Network (2004-2016)

Abstract

A new accessibility index is designed by using the resident population weighted average value of the inverse of the traveling time distance to analyze the spatial-temporal characteristics of Henan city accessibilities and its evolution patterns from 2004 to 2016.The results show that as the expanding and perfecting of Henan highway traffic network, the city accessibility levels have been effectively improved, and produced obvious spatial convergence effect. The spatial distribution pattern of city accessibilities show more significant trend with time, the city accessibility levels gradually weaken along the northwest-southeast direction, are relatively balanced on the east-west direction. The evolution characteristics have Obviously differences in the different years. The optimization degree in 2004-2008 is obviously higher than that of in 2008-2016. The degrees of improvement of the periphery cities are always higher than that of the other cities, the overall standard deviation gradually becomes larger. There is some non-coordination behaviors are appearing between the growth rates of the highway mileage and the growth rates of the city accessibility. The aggregation characteristics of city accessibility are gradually weakening, the aggregation area gradually decreases. The spatial distribution of city accessibilities and population gradually tend to be harmonious