A rolling horizon implementation is used to provide predictive guidance. Under this model, the route guidance is periodically generated and evaluated for a given time horizon (e.g. 45 minutes) based on the latest information available. However, only the guidance until the next guidance update (e.g. 15 minutes) is actually implemented. In the implementation of an ATIS, the following parameters are of interest:
Figure 4-2: Rolling horizon implementation of
guidance generation