An advance notification system and method notifies passengers of the impending arrival of a transportation vehicle, for example, a school bus, at a particular vehicle stop. The system generally includes an on-board vehicle control unit for each vehicle and a base station control unit for making telephone...http://www.google.de/patents/US7030781?utm_source=gb-gplus-sharePatent US7030781 - Notification system and method that informs a party of vehicle delay
