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).