Patent ID: 9035796
Filing Date: 2015-05-19
Classification: G08G

Abstract:
1. A method, comprising: determining a position of a vehicle on a segment of a roadway over which the vehicle is currently travelling; identifying a change in speed limit for a segment of the roadway that the vehicle is approaching relative to the current segment of the roadway; assessing speed limit information of the current segment of the roadway and the approaching segment of the roadway; determining a speed limit information presentation zone of the current segment of the roadway within which speed limit information for the approaching segment of the roadway is to be presented to a driver of the vehicle after determining that a speed limit of the approaching segment of the roadway is lower than at least one of a speed limit of the current segment of the roadway and a current speed of the vehicle; assessing a position of the vehicle relative to the speed limit information presentation zone; determining a speed limit warning zone on the roadway within which a notification indicating that the current speed of the vehicle is greater than the speed limit of the approaching segment of the roadway is presented to the driver, the speed limit warning zone having a warning notification distance, defining a distance at which the driver is initially notified of the change in speed limit, that is a function of the current speed of the vehicle, the speed limit for the approaching segment of the roadway and a vehicle deceleration factor including a measured deceleration of the vehicle corresponding to an actual deceleration of the vehicle at a point in time such that the measured deceleration of the vehicle influences a magnitude of the warning notification distance; assessing the position of the vehicle relative to the speed limit warning zone; and providing the speed limit information for the approaching segment of the roadway to the driver in response to determining that the vehicle is within the speed limit information presentation zone.