Traffic sign

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Many countries place signs on the side of roads, called traffic signs, to deliver information to passing motorists. Different languages cause barriers, so international signs with symbols have been developed in Europe and adopted in most countries and areas in the world. Annex 1 of the Convention on Road Signs and Signals, of 8 November 1968 has 8 categories of signs:

A. Danger warning signs
B. Priority signs
C. Prohibitory or restrictive signs
D. Mandatory signs
E. Special regulation signs
F. Information, facilities or service signs
G. Direction, position or indication signs
H. Additional panels

Countries and areas categorize road signs in different ways. The categories in the United States are:

Regulatory signs
Warning signs
Marker signs
Guide and informational signs
Recreational and cultural interest igns
Signs for bicycle facilities
Construction signs
Railroad crossing signs
School signs
Civil defense signs

External links

http://www.unece.org/trans/conventn/legalinst.html -- Legal instruments in the field of transport -- Number 10 is the Convention on Road Signs and Signals, of 8 November 1968, including the annexes.

http://homepages.cwi.nl/~dik/english/traffic/ -- Excellent collections of international road traffic signs

http://members.aol.com/rcmoeur/signman.html -- Unofficial Manual of Traffic Signs in the United States