考虑出行方向的广州出租车时空可达性研究

出行方向是可达性研究中的一个关键要素, 因此, 提出一种考虑出行方向的出租车时空可达性分析方法。根据出租车经验路径分方向构建经验等级路网, 采用基于分层路网的Dijkstra算法计算得到各OD对之间的行程时间, 作为可达性评价指标, 并采用网格法和反距离加权插值法绘制得到广州市中心商业区等时线及其渲染图, 分方向、分时段对其时空可达性进行分析。结果证明了不同出行方向下, 特别是处于高峰时段, 可达性有较大的不同。

Research on space-time accessibility considering direction of travel

Direction is a key factor of accessibility research. Therefore, this paper proposed a calculation method on space-time accessibility considering the direction of travel. First, it constructed an experiential hierarchy of road network using experiential taxi routes. Second, it used the Dijkstra algorithm based on hierarchical road network to compute the travel time between each OD, and then used a grid method and inverse distance weighting method to render the isochrones maps of Guangzhou CBD. Finally, the paper analyzed the accessibility of it in different direction of travel and different time periods. The experimental results prove that accessibility in different direction, especially in peak time, is quite different.