Axial relative speed indicator

摘要

A speedometer displays a numeric representation of the speed of a vehicle, and further displays an indicator above the numeric representation to indicate the speed of the vehicle is above an established speed limit, or displays the indicator below the numeric representation to indicate the speed of the vehicle is below the established speed limit. The chromaticity of the indicator may be varied in relation to a magnitude of a speed differential between the speed of the vehicle and the speed limit to visually and intuitively indicate to an operator of the vehicle the magnitude of the speed differential.