METHODS AND SYSTEMS FOR PROVIDING A TRAFFIC CONGESTION WARNING

摘要

A method is provided of providing jam warning messages in relation to jams affecting navigable segments of a network of navigable segments. The method comprises, for each of one or more identified jams, obtaining a jam tail flow speed for the jam. The jam tail flow speed is preferably determined from the analysis of positional data relating to the current or relatively recent movement of a plurality of devices associated with vehicles along at least some navigable segments of a navigable network with respect to time. The jam tail flow speed is used to generate, or to determine whether to generate, a jam warning message in respect of the jam.

主权项

1. A method of providing jam warning messages in relation to jams affecting navigable segments of a network of navigable segments, the method comprising:
obtaining a jam tail flow speed for an identified jam; comparing the obtained jam tail flow speed to a current speed of travel of a vehicle or a historical speed of travel along an applicable navigable segment; and generating a jam warning message using the results of the comparison when a current or historical speed of travel along the applicable navigable segment exceeds the jam tail flow speed by more than a predetermined amount.