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  2. Traffic warning sign - Wikipedia

    en.wikipedia.org/wiki/Traffic_warning_sign

    A warning sign is a type of sign which indicates a potential hazard, obstacle, or condition requiring special attention. Some are traffic signs that indicate hazards on roads that may not be readily apparent to a driver.

  3. Hazard symbol - Wikipedia

    en.wikipedia.org/wiki/Hazard_symbol

    The sign is commonly referred to as a radioactivity warning sign, but it is actually a warning sign of ionizing radiation. Ionizing radiation is a much broader category than radioactivity alone, as many non-radioactive sources also emit potentially dangerous levels of ionizing radiation.

  4. Traffic sign - Wikipedia

    en.wikipedia.org/wiki/Traffic_sign

    Sign warning of cattle crossing in a rural road of Madeira Island, Portugal. Traffic signs can be grouped into several types. For example, Annexe 1 of the Vienna Convention on Road Signs and Signals (1968), which on 30 June 2004 had 52 signatory countries, defines eight categories of signs: A. Danger warning signs; B. Priority signs

  5. Road signs in the United States - Wikipedia

    en.wikipedia.org/wiki/Road_signs_in_the_United...

    Toggle Warning signs subsection. 4.1 W1 series: Horizontal alignment. 4.2 W2 series: ... Keep left of obstacle. R4-9 Stay in lane. R4-9a Stay in lane to merge point ...

  6. Warning Sign (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Warning_Sign_(disambiguation)

    Warning Sign may refer to: . A traffic warning sign is a type of sign which indicates a potential hazard, obstacle or condition requiring special attention.; Safety sign, a sign that warns of a hazard, prohibited action, required action or equipment, and locations of safety equipment or exits

  7. Safety sign - Wikipedia

    en.wikipedia.org/wiki/Safety_sign

    A 'Danger' sign from the 1914 Universal Safety Standards. One of the earliest attempts to standardize safety signage in the United States was the 1914 Universal Safety Standards. [1] The signs were fairly simple in nature, consisting of an illuminated board with "DANGER" in white letters on a red field. [1]

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