Research on Inter- city Accessibility of Hunan Urban Agglomeration under Background of High- speed Railway

With the approaching highspeed railway age,Hunan urban agglomeration regional spatial structure changed significantly.With the introduction of the concept of accessibility and the measurement factors of weighted average travel times,economic potential and daily accessibility of the transport network in 2011 and 2030,this paper concluded that the development of highspeed railway had the following effects in Hunan urban agglomeration regional spatial structure.Firstly,highspeed railway completely enhanced accessibility within eight cities in Hunan Province,greatly shortened the temporal and spatial distance between these cities.Secondly,in spite of this,these cities also showed some differences.