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时间可靠性是公交重要的时空特性之一,提高公交时间可靠性有助于提高公共交通吸引力。基于时间地理学,从时空过程的角度对公交时间可靠性进行了研究。利用公交时空路径,提出一种城市公交时间可靠性的评价方法,该方法包括单程准时度、单程准时稳定度、站点准时度、站点准时稳定度4个指标。然后利用广州公交GPS数据对各指标进行计算。结果表明,公交时间可靠性随着线路长度增大和站点数增加而降低,随着用地类型的不同而变化,其中商业用地内的时间可靠性最大,并且时段不同,可靠性也有较大差异,其中早高峰的时间可靠性最低,从而验证了所提出评价方法的有效性。
Time reliability is one of the most important time-space characteristics of public transportation. Improving the reliability of public transportation time will help to enhance the attractiveness of public transportation. Based on the time geography, the bus time reliability is studied from the perspective of spatio-temporal process. This paper proposes a method for evaluating the time reliability of urban public transportation by using the path of transit time and space. The method includes four indicators: one-way punctuality, one-way punctual stability, site punctuality and site punctual stability. Then use the Guangzhou bus GPS data to calculate the indicators. The results show that the bus time reliability decreases with the increase of the line length and the number of stations, and varies with the type of land. Among them, the time reliability of commercial land is the highest, and the time is different and the reliability is also greatly different The reliability of the morning rush hour is the lowest, which verifies the effectiveness of the proposed evaluation method.