The Manual on Uniform Traffic Control Devices for Streets and Highways is a document issued by the Federal Highway Administration of the United States Department of Transportation to specify the stand
Cover of the 1937 typeset reprint of the first edition of the MUTCD published in 1935
Warning signs introduced in the 1971 edition, combining both symbols and words
An example of state-by-state variations: California (foreground) paints a black line to help drivers see a double yellow line demarcating opposing traffic, while Nevada (background) does not
The Convention on Road Signs and Signals, commonly known as the Vienna Convention on Road Signs and Signals, is a multilateral treaty that establishes an international standard for signing systems for
The title page of the Vienna Convention on Road Signs and Signals
