Guard rail (disambiguation)

A guard rail is a protective boundary feature.

Guard rail may also refer to:
 * Railroad guard rails (otherwise known as check rails), installed parallel to trackbed rails, for railway safety
 * RC-12 Guardrail, a U.S. Army intelligence-gathering aircraft based on the C-12 Huron
 * Roof edge protection, rails installed on roofs to protect construction and roofing workers
 * Traffic barrier, installed on roadways for automobile safety