三角警示牌

三角警示牌又称三角牌，是交通事故发生后用来向过往的车辆示意此处发生交通事故、注意避让、确保交通事故现场安全的牌子，有时会与警示灯一起搭配使用。

三角警示牌

进一步阅读

• Allen, Merrill J., Stanley D. Miller, and James L. Short. "The effect of flares and triangular distress signals on highway traffic." Optometry and Vision Science 50.4 (1973): 305–315.
• Federal Motor Carrier Safety Regulations; Technical Amendments, 59 Fed. Reg. 49,585, 49,588 (September 29, 1994) (summarizes research about warning triangles)
• United Nations Regulation No. 27. Uniform provisions concerning the approval of advance-warning triangles