Abstract
Aerial traffic flow data are collected by time-lapse photography with a helicopter mounted camera. The raw car trajectories developed from these data bases are discrete in time. In this study, a methodology was developed to produce continuous car trajectories from the discrete date base, i.e. the data base thus obtained gives location, speed and acceleration as a continuous function of time. These continuous car trajectories were then used to develop some microscopic and macroscopic characteristics of multilane traffic flow.