| China has made remarkable achievements in the development of high speed rail(HSR),which plays an important role in promoting economic and social development,supporting the implementation of the country's major strategy and enhancing China's international influence.Henan Province is located in the Mid-Eastern part of China and its location advantage is unique.Zhengzhou is a national transportation hub city,which has a decisive influence in the whole transportation network.However,detailed spatiotemporal accessibility changes of cities affected by HSR in Henan have been rarely reported.In 2011,the Ministry of Railways took into account passenger safety and greatly reduced the speed of HSR.Since then,the speed of HSR has become a hot topic of public concern and people are looking for the balance from speed,security,and economics.From the point of view of accessibility,this paper will discuss the impact of the speed change of HSR,and provide reference for the decision-making of the relevant departments.Accessibility is closely related to many natural and human factors,but there is little literature to explore the relationship between accessibility and these factors.Based on high speed rail(HSR)density and speed changes,this paper,taking Henan Province as an example,makes a comprehensive analysis and demonstration of the relative regional advantages and accessibility of the regional center and the surrounding cities.At the same time,the paper discusses the relationship between spatial and economic factors and regional accessibility.The main conclusions of this paper are as follows:(1)The spatial distribution of regional accessibility has been significantly changed by the change of network density of HSR.Especially after HSR operation in the construction,Henan will form a multi-type and multi-level integrated transportation network system,which will make travel choices more diverse,and can significantly reduce travel time and increase travel comfort.Taking ATT as an example,Shanxian(Sanmenxia),Pingqiao(Xinyang)and Yancheng(Luohe)are the biggest beneficiaries,and their reductions are all over 25%.(2)HSR speed upgrade will significantly improve the accessibility level in Henan.Taking the city's foreign travel time as an example,the average travel time in Henan will be reduced to 6.88 h and 6.19 h(in Scenario 4 and 5)after HSR speed upgrade.Compared with Scenario 3,their reductions are 11.70% and 20.49% respectively.(3)The counties along HSR corridor are the main beneficiaries and the counties outside the HSR corridor can integrate into the HSR network and increase accessibility through nearby HSR stations.And counties with new HSR stations may become new regional centers.The surrounding area is also one of the important beneficiaries of HSR network,but Zhengzhou,Xuchang and Luohe are still the most important regional accessibility centers.Taking DA as an example,the average growth rate(26.76%)of the 53 counties along HSR is far higher than the average growth rate(6.19%)of the counties which are not along HSR.(4)Two kinds of analysis methods,intra domain and extra territorial,can more fully describe the accessibility advantages of cities under different conditions,which are effective to prevent the incomplete conclusion from one angle of view.The accessibility change of Luohe,Xinyang and Pingdingshan is the most representative.The geographic scale has a significant impact on accessibility analysis results.The degree of correlation between slope,urbanization rate,per capita income and regional accessibility is the highest,but the economic development and accessibility of some cities in Henan don't match and they don't effectively turn the traffic location advantage into economic advantage. |
PDF Full Text Request