基于线网滤波组合逼近法的公交通行效率提升研究——以成都市二环高架BRT为例

Research on Efficiency of Public Transport Using Filtering Combination Approximation——Evidence from the Elevated BRT of the Second Ring in Chengdu

针对高峰值多峰公交线路因配车多且发车频率高所引发的线路运转效率相对低下等问题,本文提出滤波组合逼近法,旨在优化公交线网以提升城市公交通行效率。借助IC卡、RFID技术、图像识别等现代信息技术,以及OD客流调查,获取高峰值多峰公交线路的站点客运量值,采用Matlab多项式曲线拟合真实客流数据获取客流量函数。通过滤波消除多峰高峰值站点,综合运用数据挖掘技术对高峰值多峰公交线路站点客运量与原线路实现魏尔斯特拉斯逼近。最后以成都市二环高架BRT为例,验证和测度滤波组合逼近法对BRT线网提档升级的可操作性和高效性,据此提出既能保证原线路客流的全覆盖,还能减少换乘次数、降低发车频次等切实可行的线网优化举措。

In order to meet the public transportation needs of the rush hour, more buses are being configured, resulting in inefficient operation. Thus, the filtering combination approximation is put forward to improve the efficiency of urban transit by optimizing bus lines. Passenger quantity of each site is obtained through modern information technology, such as IC card, RFID technology, image recognition technology, as well as the transit OD passenger flow survey. The polynomial curve fitting is adopted to fit the real traffic data for traffic function. Multi-peak site is eliminated using filte- ring. Data mining technology is applied to realize Weierstrass approximation, which is between the site traffic of bus lines of multi-peak with peak value and the original bus lines. Finally, the operability and efficiency are validated using filtering combination approximation to optimize the bus rapid transit network. Meanwhile, the feasible measures of net- work optimization are put forward. These measures are not only guaranteeing the full coverage of the original line, but also reduce the number of transfer times and the frequency of the buses.