Traffic Oscillation Properties on Roads Intersection

This paper investigates traffic oscillation properties on roads intersection from frequency鄄domain perspective. According to the traffic oscillation characteristics on the roads intersection, a data sequence from the detector is the superposition of three sets of sinusoidal components, representing high鄄frequency noise, low-frequency trend and mid鄄range oscillations. The analysis found that the low鄄frequency signal relates to the changes of driving cycle generated by varying traffic demand, the high鄄frequency noise relates to the local random perturbations like driving behavior, and the mid鄄range oscillations relate to the frequently accelerating鄄decelerating operations in the driving cycles. So it proposes a de鄄trended fluctuation analysis to eliminate low鄄frequency velocity data trend, and use the Wavelet analysis method to eliminate high鄄frequency noise, and then apply the Frequency Analysis to study the wave characteristics for traffic stream on the different locations. The results show that the obviously wave at near the roads intersection.