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This SAE Recommended Practice describes the design evaluation tests and performance criteria for a School Bus Stop Arm equipped with alternately flashing lights. Decision for adoption of the recommendations presented in the Appendix is left to governmental units who adopt this practice.

This engineering design specification provides design parameters and general requirements for School Bus Stop Arms equipped with alternately flashing lights. The stop arm is intended as an optional device which may be used in addition to, but not as a substitute for, school bus signal lamps covered by SAE J887(July, 1964). Decision for adoption of the recommendations presented in the Appendix is left to governmental units or other bodies who adopt this practice.

This technical report provides test procedures, dimensional data, design specifications, and performance requirements for red and yellow school bus warning lamps.

This technical report provides design guidelines, test procedure references, and performance requirements for flashing incandescent warning lamps. It is intended to apply to, but is not limited to, surface land vehicles.