为了利用公交GPS数据估计交叉口信号配时参数,提出了一种改进的插值法来估计交叉口单车行程时间;通过先聚类再分类划分信号周期;给出了采用停车线附近的GPS数据序列估计周期边界及周期时长的方法;结合周期边界估计结果,提出了一种新的红灯时长估计方法.在不同交通流量下对估计方法进行了模拟及现场测试,结果表明,基于公交GPS数据的信号配时参数估计方法适用于不同交通流量,且估计效果明显优于现有方法. In order to estimate the signal timing parameter of the intersection with the GPS data of the bus, an improved interpolation method is proposed to estimate the cycle time of the bicycle at the intersection. The cycle of the signal is divided by clustering and reclassification. The GPS data sequence near the parking line A method of estimating the red-light duration is proposed based on the results of periodic boundary estimation.The simulation and field tests of the estimated methods are carried out under different traffic flows.The results show that based on the GPS data of the bus Signal timing parameter estimation method is suitable for different traffic flow, and the estimated effect is obviously better than the existing methods.