Interpretation ID: nht69-1.47
DATE: 09/04/69
FROM: AUTHOR UNAVAILABLE; C. A. Baker; NHTSA
TO: Department of California Highway Patrol
TITLE: FMVSS INTERPRETATION
TEXT: Thank you for your letters of August 12, 1969, to Dr. Robert Brenner, Acting Director, National Highway Safety Bureau, concerning visibility angles for turn-signal, stop and tall lamps on all vehicles requiring such lamps, and stop lamp operation on motorcycles.
Federal Motor Vehicle Safety Standard No. 108 requires that turn signal, stop and tail lamps, upon installation on vehicles subject to the Standard, meet the 45 degree, vicibility requirements specified in SAE Standards J538d, J586c and J585c.
The dual switching of stop lamps, with activation both by foot brake and hand brake on motorcycles, is required by Standard No. 108 in paragraph S3.4.4