河南省高速交通网通达性时空特征及演化规律

Spatial-temporal characteristics of Henan highway traffic network accessibility and its evolution pattern

针对河南省高速公路建设对城市通达性影响问题,该文通过定义时间阈值,设计了基于人口加权时间距离倒数的通达性指数,在4个时间断面上,研究河南省高速交通网络中通达性时空特征及演化规律,时间距离倒数有效减小了多路径时间距离对分析结果的数字影响。结果表明,随着河南高速交通网络的拓展,城市通达性水平得到了显著的提升,空间收敛显著,边缘城市的提升始终高于中心区域城市;高速公路通车里程增长率与通达性水平的改善存在非协调现象;城市通达性的空间聚集现象震荡走弱,聚集区域减少;城市通达性空间分布变化规律和城市化人口变化规律逐渐趋于协调。

Aiming at the impact of highway construction on city accessibility in Henan province, this paper designed an accessibility index by using the population weighted average value of the inverse of time distance to study the spatial-temporal characteristics of city accessibility and its evolution patterns on 4 time sections, the numerical influence of the multi-route time distances on the analysis was effectively reduced by using the inverse of time distance. The results showed that with the construction of Henan high-way network, city accessibility has been significantly improved, spatial convergence was obvious, the change rates of the marginal cities were always more significant than that of the central cities. There was some nonconforming phenomenon in highway mileage growth and the improvement of the city accessibility. The spatial aggregation phenomena of city accessibilities weakened in shock, the aggregation regions gradually reduced. The spatial distribution of city accessibilities and population gradually tended to be coordinated.