Patent ID: 9183743
Filing Date: 2015-11-10
Classification: G08G

Abstract:
1. A method of estimating traffic signal information and adjusting an operation of an on-board system of a vehicle, the method comprising: obtaining positioning system data from each of a plurality of vehicles, wherein said positioning system data for each of the plurality of vehicles comprises position and velocity of a vehicle as functions of time; for an intersection having a traffic signal, estimating an average acceleration of the vehicles when leaving the intersection and an average deceleration of the vehicles when approaching the intersection; for each of a subset of the vehicles, estimating a stop duration at the intersection based on an estimated stop time, an estimated start time, the average acceleration, the average deceleration, and the positioning system data for the respective vehicle; removing vehicles from the subset for which the estimated stop time is greater than the estimated start time; estimating a duration of a red phase of the traffic signal based on the stop duration of each of the subset of the vehicles; and adjusting the operation of the on-board system of the vehicle based, at least in part, on the estimated red phase of the traffic signal.