Interpretation ID: aiam4606
SD 57709;
Dear Mr. Willaredt: This is in reply to your letter to Taylor Vinson o this Office, received by FAX on May l7, l989. You have developed a 'safety light' that displays right and left turn signals, 'and when the caution light/emergency light appears, the formation of such lights indicate a diamond'. The device appears intended for installation on large trucks or trailers. The turn signal lamps are supplementary to a vehicle's original equipment turn signal lamps. I assume that the caution/emergency lamp to which you refer is what we call a hazard warning signal, sometimes known as a 4-way flasher. You have asked for written approval of this device. This agency has no authority to 'approve' or 'disapprove' any motor vehicle or item of equipment. We can, however, advise as to the relationship of equipment to applicable Federal motor vehicle safety standards. I enclose copies of representative letters covering other auxiliary rear lighting for large trucks, such as wide-turn and U-turn indicators, and their relationship to Motor Vehicle Safety Standard No. l08, the National Traffic and Motor Vehicle Safety Act, and State law. These principles are applicable to your safety light as well. If you have any further questions, we shall be happy to answer them. Sincerely, Stephen P. Wood Acting Chief Counsel Enclosures;