Interpretation ID: nht93-8.14

DATE: November 16, 1993

FROM: John Womack -- Acting Chief Counsel, NHTSA

TO: Ray Paradis -- Manufacturing Manager, Dakota Mfg. Co., Inc.

TITLE: None

ATTACHMT: Attached to letter dated 8/31/93 from Ray Paradis to Pat Boyd (OCC-9151)

TEXT:

This responds to your letter of August 31, 1993, to Pat Boyd of this agency with respect to the trailer conspicuity requirements of Federal Motor Vehicle Safety Standard No. 108. You have enclosed literature and photos of several of your trailers, and ask for our comments in several areas.

Your first remark is "Deck heights are from 22" to 39 1/2"." We understand this to ask whether these are acceptable heights for mounting conspicuity treatments. Standard No. 108 was amended on October 6, 1993, to specify a mounting range as close to 375 to 1525 mm as practicable, i.e. approximately 15 to 60 inches. Your "deck heights" are within this range.

Your second remark is "(t)he rear design does not allow for continuous tape all models." Standard No. 108 requires a horizontal strip of retroreflective sheeting across the full width of the trailer. Paragraph S5.7.1.3(b) anticipates that the length of the color segments may have to be modified to facilitate using material near rear lamps. In the worst cases of trailers with rear surfaces no wider than the minimum required for lamps, breaks in the rear treatment are unavoidable to clear the lamps. But NHTSA expects the manufacturer to minimize the breaks by using red material adjacent to red lamps.

Your third remark is (t)he side extension model has fold-up sides #2." We understand this to ask whether striping must be applied so as to be visible only when the extension is folded, or whether striping must also be visible when the extension is in use, i.e., whether striping must be applied to both surfaces of the extension so that it is visible regardless of the position of the extension. Although Standard No. 108 does not directly address this question, we believe that motor vehicle safety requires visibility of conspicuity treatment at all times. The standard does require that striping not be obscured by other motor vehicle equipment or trailer cargo, reflecting the agency's intent that striping be visible when the trailer is performing its intended work-related functions. This means that side extension model trailers should be equipped with conspicuity treatment that is visible both when the extensions are folded and unfolded.

Your final remark is "((d)oes the front require any stripe." Under the assumption that you refer to the front side of a trailer and not the front that is hidden behind the towing vehicle, the answer is yes. Standard No. 108, in pertinent part, requires conspicuity treatment to be applied as close to the front of a trailer as practicable. Goosenecks and tongues are part of the trailer front and are portions of a trailer requiring conspicuity treatment if practicable.

I hope that this answers your questions.