Space-time accessibility measures: A geocomputational algorithm with a focus on the feasible opportunity set and possible activity duration
Space-time accessibility measures: A geocomputational algorithm with a focus on the feasible opportunity set and possible activity duration
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DOI：
10.1007/s101090300104
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发表时间：
2003-05
影响因子：
2.9
通讯作者：
Hyun-Mi Kim;M. Kwan
中科院分区：
文献类型：
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作者：
Hyun-Mi Kim;M. Kwan
时空可达性由于对个体参与活动能力的时空差异具有敏感性，近年来备受关注。尽管时空测量在概念上具有吸引力和鲁棒性，但迄今为止对其进行操作的尝试很少。寻求改进时空可达性措施的研究仍然是迫切需要的。本研究旨在通过开发新的操作方法和基于gis的算法，更好地代表城市机会（如其地理分布和开放时间）和人类活动-出行行为（如延迟时间、最小活动参与时间和最大出行时间阈值）的时空特征，从而增强时空可达性措施。建议的方法不仅考虑了机会的数量和大小，而且考虑了每个活动地点在开放时间和交通网络拓扑（例如单行道、转弯限制和立交桥）的影响下可能的活动持续时间。将这些元素纳入时空测量有助于克服以前评估时空可达性方法的几个缺点。
Space-time accessibility measures have received much attention in recent years due to their sensitivity to differences in individual ability to participate in activities in space and time. Despite the conceptual attractiveness and robustness of space-time measures, only few attempts have been made to operationalize them to date. Research that seeks to improve space-time accessibility measures is still sorely needed. This study seeks to enhance space-time accessibility measures through developing a new operational method and GIS-based algorithm that better represents the space-time characteristics of urban opportunities (e.g. their geographical distribution and opening hours) and human activity-travel behavior (e.g. delay times, minimum activity participation time, and maximum travel time threshold). The proposed method not only takes into account the number and size of opportunities, but also the possible activity duration at each activity location given its opening hours and the effect of transport network topology (e.g. one-way streets, turn restrictions and over-pass). Incorporating these elements into space-time measures helps overcome several shortcomings of previous approaches to evaluating space-time accessibility.