摘要
城市公共交通的可达性体现了公共交通系统的发展水平,该研究为制定城市公共交通规划、优化社会服务设施空间布局等城市发展问题提供了有利的科学支撑。借助ArcGis软件,采用网络分析法,生成了长春市公共交通网络图;以最短可达时间和公共交通的服务频次作为评价指标,将非高峰和高峰时段作为时态的划分依据,探讨了长春市各居住小区和医院之间的可达性的时空分布特征。结果表明:长春市居住小区的平均可达时间等级整体水平较高,且非高峰时段优于高峰时段;居住小区的平均可达时间等级在空间上分异显著,呈现出不连续的圈层式分布;可达时间等级越高的居住小区,周边的公共交通服务频次等级越高,但两个等级间并不存在完全的一致性,且高峰时段的公交服务频次明显高于非高峰时段;各医院在非高峰时段的时间可达性较好,而在高峰时段有了较为显著的下降,不同等级医院的平均可达时间各不相同,但其差异并不显著。在上述分析的基础上,进而探讨了长春市公共交通存在的问题及原因,并提出了优化建议。
The accessibility of urban public transportation reflects the level of development of the public transportation system and provides a favorable scientific support for formulating urban transport planning, optimizing spatial distribution of social service facilities and so on. Applying ArcGis9.3, this article created a public transportation network of Changchun. The shortest accessible time and public transportation service frequency were selected as the indexes of accessibility assessment and we took the off-peak and peak hours as the dividing basis of time. We analyzed the accessibility of residential districts to the hospitals during the peak and off-peak hours. Moreover, this article analyzed the average accessible time of hospital to residential districts during the peak and off-peak hours. The results found that: The overall level of residential districts' average accessible time was higher and the accessibility of off-peak hours was better than that of peak hours. The spatial heterogeneities are conspicuous. The distribution pattern of residential districts' average accessible time shows a discontinuous concentric trend. The shorter the residential districts' average accessible time, the higher the transportation service frequency, but it does not necessarily mean that these two indexes are always consistent. During peak hours, the public transportation service frequency has been significantly improved. The level of hospitals' average accessible time is better during off-peak hours, while in the peak hours there is a remarkable descent. The average accessible time of hospitals at different levels is not identical, but the differences are not significant. On the basis of the above analysis, we examined the problems and reasons of public transportation in Changchun and proposed relevant suggestions.
出处
《地理研究》
CSSCI
CSCD
北大核心
2014年第5期915-925,共11页
Geographical Research
基金
国家自然科学基金项目(41071325)
关键词
GIS
可达性
公共交通
医院
居住小区
长春市
GIS
accessibility
public transport
hospital
residential district
Changchun City
