Accessibility Research of Highway Network System in Henan Province

Abstract

The accessibility index is designed by using the inverse of time distance and population weighted average value to research the city accessibilities in a region, with the definition of time threshold, which not only considers the transportation characteristics of each segment in the region, but also effectively reduces the digital effects from measurement on the analysis results, makes the analysis result could better reflect the reality at the same time. The results show that the Henan highway traffic network is relatively perfect, basically have been forming a high speed transportation system with the provincial capital, Zhengzhou, as the center. The city accessibility indexes in Henan province show the characteristics of normal distribution, the Accessibility differences are relatively obvious, the regional distribution of highway is very unbalanced. The accessibilities have high-high and low-low aggregation phenomenon, the Accessibility along the north to South and northwest to southeast direction becomes worse; the accessibility distribution and population distribution exist obvious departure.