基于大数据的出租车与普通小汽车行驶速度差异研究

Research on the Difference of Taxi and Car Speed based on Big Data

利用出租车车载GPS数据分析城市道路交通运行情况已被北京、广州、深圳等城市广泛采用,但是出租车能否代表普通小汽车的运行特征是必须回答的问题。利用大数据技术,通过分析重庆市主城区出租车和一定数量普通小汽车连续一个月的车载GPS数据,研究重庆主城区出租汽车和普通小汽车在同样道路交通环境下的行驶速度差异性,并拟合出不同速度等级下两者的偏差曲线。研究表明,直接利用出租车行驶速度来表征城市道路交通运行情况存在一定的误差,但可以通过速度偏差曲线进行校正,从而使评估分析的结果更能代表道路使用主体的交通运行特征,提高实时信息系统的准确性和可信度。

By means of taxi GPS data to analyze operation of city road traffic has been widely used in Beijing, Guangzhou, Shenzhen and other city, but one question is that whether the taxi operating characteristics can represent the ordinary car. In this paper through big data technology, GPS data of Chongqing downtown taxies and a certain number of ordinary cars for one month are analyzed to study the speed difference of the taxi and ordinary cars in the same road traffic environment, atthe same time, the deviation curve of the two under different speed are fitted. The study shows that there are some error to present the city＇s road traffic situation by directly use of taxi, but it can be corrected by the speed deviation curve, so that the results of the analysis can be more representative of the traffic operation characteristics of the main road, and improve the accuracy and reliability of real-time information systems.