Description / Abstract:
This SAE Recommended Practice applies to retroreflective
materials that are used on truck tractors and trailers 2032 mm or
more in overall width and with a Gross Vehicle Weight Rating (GVWR)
over 4536 kg, and school buses. The retroreflective materials for
the truck tractors and trailers are super-high-intensity materials
containing microprisms. The retroreflective materials for school
buses may contain flexible non-exposed glass bead lens or
microprisms.
Purpose
This document establishes test procedures and related
requirements for identifying and evaluating retroreflective
materials intended for use in passive devices used to enhance the
conspicuity of vehicles at nighttime.
Conspicuity materials meeting the requirements of this document
are intended to be in compliance with Code of Federal Regulations
Title 49 Part 571.108 otherwise referred to as FMVSS-108 which
references ASTM D 4956 Type V materials. The specifications in this
document are not intended to apply to materials used for commercial
identification, advertising, or similar graphics. Their use is
outside the scope of this document. School bus retroreflective
materials specified in this document are intended to comply with
the requirements of FMVSS-217 (49CFR 571.217) and FMVSS-131 (49CFR
571.131).