摘要
发展公共交通对于解决城市交通问题意义重大,提高地面公交可达性是增强公共交通吸引力的有效途径之一。用于区域疏散风险评价的临界簇模型(CriticalClusterModel,CCM)将需要疏散的人口与由此产生的对道路容量的需求相结合,通过对道路网进行全局优化,确定具有较高疏散困难度的区域。基于道路容量需求与可达性所表征的交通便捷程度意义相反的关系,以地面公交线网为对象,在已知城市人口分布的条件下,考虑公交线路重复数的影响,对CCM加以改进,提出通过计算公共交通线路容量需求来评价地面公交线网可达性的方法。将CCM应用于北京市地面公交线网可达性评价的结果表明,这一方法具有一定的实用性。鉴于地面公交线网可达性的重要意义和CCM的可扩展性,今后需要在现有工作基础上,对可达性评价方法进行深入探讨。
The Critical Cluster Model （CCM） is a network optimization model that can be used to identify neighborhoods facing transportation difficulties during an evacuation process. It defines the Bulk Lane Demand （BLD） as the ratio of population to exit capacity that is adversative to the meaning of accessibility. Based on this context, this paper applies CCM to assess the accessibility of public bus network by introducing multiple bus lines in the certain road sections and considering the spatial distribution of population being assigned to each bus stop. The bulk bus line demand, as the substitution of original BLD, is therefore used to reflect the people＇s convenience in taking public buses. An application of CCM in accessibility assessment of public bus network in Beijing tests the flexibility of this method. Considering the importance of accessibility in urban transportation, the modification of CCM by introducing other factors should be the focus of further studies.
出处
《地理学报》
EI
CSCD
北大核心
2009年第6期693-700,共8页
Acta Geographica Sinica
基金
教育部留学回国人员科研启动基金资助(教外司留[2007]24)
科技部"十一五"科技支撑计划项目(2006BAJ10B03)~~
