Intersection signal timing estimation using bus GPS data

Abstract

Signal timing information (such as cycle length, red time, etc.) is important to bus scheduling and travel time estimation, etc. So it is of great significance to estimate the signal timing information. The existing signal timing estimation method cannot timely respond to the changes of the signal timing parameters, and it cannot well estimate the time that the vehicle arrives at the stop line. Furthermore, it assumes a uniform arrival pattern of the intersection. In order to solve the above problems, a new signal timing estimation method using bus GPS data is proposed. In order to estimate the signal timing parameters, an improved interpolation method is proposed to estimate intersection travel time of individual vehicles, and a new method of cycle breaking is proposed. Then, a method for estimating cycle boundary and cycle length using the GPS data sequence near the stop line is given. Combined with the cycle boundary estimation results, a new method for estimating red time is proposed. The simulation and field test results show that the proposed signal timing estimation method is valid and the estimation effect is obviously better than the effect of the existing method.