This standard specifies performance requirements for location@ identification@ color@ and illumination of motor vehicle controls@ telltales and indicators. Purpose. The purpose of this standard is to ensure the accessibility@ visibility and recognition of motor vehicle controls@ telltales and indicators@ and to facilitate the proper selection of controls under daylight and nighttime conditions@ in order to reduce the safety hazards caused by the diversion of the driver's attention from the driving task@ and by mistakes in selecting controls. S3. Application.