Interpretation ID: nht93-8.25

DATE: November 22, 1993

FROM: John Womack -- Acting Chief Counsel, NHTSA

TO: Bob Carver -- Wayne Wheeled Vehicles

TITLE: None

ATTACHMT: Attached to letter dated 10/01/93 Est. from Bob Carver (OCC-9218)

TEXT:

This responds to your letter in which you referred to this agency's final rule amending Federal Motor Vehicle Safety Standard (FMVSS) No. 217, Bus Emergency Exits and Window Retention and Release, dated November 2, 1992 (57 FR 49413). Specifically, you referred to S5.5.3(c) of FMVSS 217, as amended, and asked whether it was necessary to outline an emergency roof exit with retroreflective tape even though the tape would not be visible unless the bus is tilted on its side. You also asked whether the tape width requirement will be changed to 1 inch.

As you correctly quoted in your letter, S5.5.3(c) of FMVSS 217, as amended by our final rule of November 2, 1992, provides:

Each opening for a required emergency exit shall be outlined around its outside perimeter with a minimum 3 centimeters wide retroreflective tape, either red, white, or yellow in color, that when tested under the conditions specified in S6.1 of 571.131, meets the criteria specified in Table 1.

The plain language of this provision requires every school bus emergency exit required by the standard to be outlined by the retroreflective tape, including required roof exits. No exceptions are provided in the standard.

I note that the November 1992 final rule required additional emergency exits for school buses, but provided manufacturers various options from which to choose. Roof exits were specified as one option because of their potential safety benefits in rollover situations where the bus comes to rest on its side. Further, roof exits could also serve as potential exit routes where other exit routes were either unavailable or inoperative. The retroreflective tape requirement was intended to increase the conspicuity of emergency exits in low-light situations. In a situation where a bus is resting on its side, the increased conspicuity of a roof exit could be critical for safety.

With regard to the width of the tape, we proposed a 1-inch retroreflective tape in the NPRM. However, in the final rule that 1 inch measurement was inadvertently converted to 3 cm rather than the correct 2.5 cm. We are in the process of issuing a technical amendment to the final rule which will specify that the tape must be not less than 2.5 cm (1 inch) in width rather than 3 cm.

I hope this information will be of assistance to you. Should you have any further questions or need any additional information, please feel free to contact Walter Myers of my staff at this address or at (202) 366-2992.