| Signs and Signals (56)  
  
  Traffic Sign and Signals   - International overview, emphasizing the Vienna Convention of 1968 standardizing traffic control. Thorough links section. - http://homepages.cwi.nl/~dik/english/traffic/       
  Manual on Uniform Traffic Control Devices   - The standard for signs, signals, and pavement markings in the United States. Includes HTML and .pdf versions. - http://mutcd.fhwa.dot.gov/        
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