Abstract
To calculate the public transit accessibility value and its differences in a particular area to surrounding regions, this paper raised a new concept-- Area Public Transit Accessibility (APTA). This concept is based on the passenger travel behavior, travel psychology hypothesis and the service range of transit network and road network. By using the software –ArcGIS, this paper established the formula and showed the calculation steps. This method was applied to evaluate the accessibility values of every traffic zone in Beijing Chaoyang district. The results showed that the APTA can give us a clear description of the accessibility value level in a particular area to surrounding regions, which provides quantitative information for location analysis and public transit network optimization
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