Abstract: A method for providing traffic data by GPS based vehicle position data at a central data base from a plurality of vehicles including at least one car or truck and a least one bicycle via separate connections from the vehicles, tracking the speeds and positions of each vehicles and determining from the tracked speeds and positions when the one of the vehicles, such as a cycle, is approaching another vehicle and traveling in the same direction on the same roadway. The method includes determining when at least two of the vehicles enter a notification zone there between and notifying another vehicle, such as a car or truck, that the other vehicle or vehicles has entered the notification zone.