Interpretation ID: aiam1321
Standards Engineer
Crane Carrier Company
P.O. Box 4508
Tulsa
OK 74104;
Dear Mr. Gambill: This is in reply to your letter of November 7, 1973, to Mr. Schneide asking whether Standard No. 108 permits four identification lamps.; It does not. The purpose of the three-lamp system is that vehicles 8 inches or more in overall width be clearly identified as large vehicles, and only the three-lamp system specified by the standard is permissible. Standard No. 108, however, allows some latitude in mounting. The system need not be mounted on the vertical centerline of the vehicle if the manufacturer determines that is impracticable. Since you appear to have made such a determination, the front identification lamp system should be placed 'as close as practicable to the vertical centerline' with height and spacing requirements in accordance with Standard No. 108.; Yours truly, Richard B. Dyson, Assistant Chief Counsel