This standard specifies the symbols, that is, conventional signs, with which certain controls, indicators and tell-tales of a road vehicle are to be provided in order to insure their identification and facilitate their utilization. It also indicates the colors of possible optical tell-tales which warn the driver of the operation or malfunctioning of the devices and equipment connected to the corresponding controls. This standard is applicable to those controls which are fitted on the instrument panel, or in the immediate vicinity of the driver.