User:The Navigators/Sandbox workspace

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List of common symbols[edit]

Type of Hazard	Text Description^[a]	ISO 7010	GHS	DIN 4844-2	United Kingdom (1996)	United States^[b]
Generic hazard	Exclamation mark		—
Ionizing radiation	A small circle, with three 'blades'		—
Non-ionizing radiation	Worldwide (Including USA): A radio antenna emitting 3 lines on each side USA:A red and black square on point with Warning - Radio-Frequency Radiation Hazard Sign		—
Biological hazard	Four interconnected circles		—
High voltage	Lightening bolt USA: Hand being shocked by wire		—
Laser hazard	A circle emitting lines in all directions		—			^[1]
Corrosive substance	Hand & block being dissolved by contents of a test tube					^{[image needed]}
Explosive substance	Ruptured circle emitting lines and irregular shaped pieces					^{[image needed]}
Flammable substance	Flame					^{[image needed]}
Oxidizing substance	Flame on a ring					^{[image needed]}
Irritant/harmful	GHS: Exclamation mark EEC, DIN, UK: A lowercase "x"	—				—
Poisonous substance	A skull with two crossed bones
Carcinogen	GHS: Silhouette of a person, with a white six legged asterisk over the chest. USA:Vertically interlocked 'C's that continue "infinitely".			—	—

Type of hazard	Unicode glyph	Unicode
Generic caution	⚠	U+26A0
Poison	☠	U+2620
Ionizing radiation	☢	U+2622
Radiation – high-level source
Non-ionizing radiation
Biological hazard	☣	U+2623
Carcinogen
High voltage	⚡︎	U+26A1
Laser hazard
Accident	⛌	U+26CC
Disabled car	⛍	U+26CD
Icy road	⛐	U+26D0
More hazard symbols can be found on the list of GHS hazard pictograms and the list of DIN 4844-2 warning symbols

Warning sign[edit]

Modern warning sign shapes and colors[edit]

World map of typical designs in use
Color indicates prevalent type of warning signs in use (click for large image and detailed info key).

Standard designs
Diamond-shaped with yellow background and black border, yellow on the map.
Triangular with red border and white background, bright red on the map.
Triangular with red border and yellow background, dark red on the map.
Triangular with black border and yellow background, green on the map.

Warning sign shape an design largely breaks into two categories, 'MUTCD inspired' or 'European inspired'.

MUTCD inspired[edit]

Manual of Uniform Traffic Control Devices (MUTCD) first introduced in 1935, derived from some earlier documents by the AASHO and American Engineering Council in the 1920s.^[2] warning signs consisted of a mix of words and symbols with symbols being reserved for showing intersections and curves in the roadway. This trend continued in the United States until the introduction of symbols in the 1971 MUTCD, which led to the phase out of text based warning signs.^[3] Most countries that use MUTCD inspired designs are located in North America and South America, however other countries outside of the Americas have adopted use of MUTCD inspired signs.

European inspired[edit]

Commonly adopted in European countries, the Vienna Convention on Road Signs and Signals

Common messages[edit]

Warning signs can indicate any potential hazard, obstacle or condition requiring special attention. Some of the most common warning signs are the following.

General caution[edit]

Notes[edit]

^ Describes general appearance of symbol used by most standards.
^ ANSI Z535 does not require specific symbols, and allows variation in designs.

References[edit]

^ Occupational Safety and Health Administration. "OSHA Technical Manual - Section III: Chapter 6 - Laser Hazards". osha.gov. Archived from the original on 28 September 2019. Retrieved 19 January 2020.
^ American Association of State Highway Officials (7 November 1935). "Manual on Uniform Traffic Control Devices for Streets and Highways" (PDF). American Association of State Highway Officials. Retrieved 29 November 2018.
^ Federal Highway Administration (13 November 1970). "Manual of Traffic Control Devices - 1971" (PDF). United States Department of Transportation. Retrieved 29 November 2018.

[1] Describes general appearance of symbol used by most standards.

[2] ANSI Z535 does not require specific symbols, and allows variation in designs.

[3] Occupational Safety and Health Administration. "OSHA Technical Manual - Section III: Chapter 6 - Laser Hazards". osha.gov. Archived from the original on 28 September 2019. Retrieved 19 January 2020.

[1935_MUTCD-4] American Association of State Highway Officials (7 November 1935). "Manual on Uniform Traffic Control Devices for Streets and Highways" (PDF). American Association of State Highway Officials. Retrieved 29 November 2018.

[1971_MUTCD-5] Federal Highway Administration (13 November 1970). "Manual of Traffic Control Devices - 1971" (PDF). United States Department of Transportation. Retrieved 29 November 2018.

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