Abstract: A system for measuring a grade of a road includes at least two ride height sensors. Each sensor is mounted to the vehicle to detect a distance between the road and Its mounting location. Acceleration sensors mounted to the vehicle detect acceleration of the vehicle along at least one axis. Gyroscopes mounted to the vehicle detect one of pitch, roil or yaw of the vehicle. A global positioning unit (GPU) determines a geolocation of the vehicle. A processor includes at least one input connected to the height sensors, at least one input connected to the acceleration sensors, at least one input connected to the gyroscopes, and at least one input connected to the GPU. The processor is configured to calculate road grade from the plurality of Inputs and to associate the calculated road grade with geolocation of the vehicle associated with the calculated road grade.