Patent ID: 9592833
Date: 2017-03-14
CPC Classifications: B60W

Claim:
1. A device for use in a vehicle traveling at varying velocities on a road having a curve, said device comprising: a digital inclinometer or accelerometer configured to provide measured side friction data experienced by the vehicle when traveling at the varying on the curve including when the vehicle is stopped on the curve; a GPS receiver configured to provide a plurality of measured data points, each data point having a time, longitude data for the vehicle, latitude data for the vehicle, and speed data when the vehicle is traveling at the varying velocities on the curve including when the vehicle is stopped on the curve; and a processor configured to determine a recommended speed for the curve based on the measured side friction data, time, longitude data and latitude data, wherein said processor is further configured to determine a radius of the curve based on the longitude data and the latitude data, and to determine the recommended speed based on the radius, the speed data, and the measured side friction data, wherein said processor determines the radius of the curve by generating a parabola based on the longitude data and the latitude data for each of the plurality of collected data points and determining the radius for each of the plurality of collected data points.