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This file is in the public domain because it comes from the Manual on Uniform Traffic Control Devices, sign number R1-2, which states specifically on page I-1 that: Any traffic control device design or application provision contained in this Manual shall be considered to be in the public domain.
The left guide sign is from the 2003 MUTCD, and the right sign is from the 2009 MUTCD. The tenth edition of the MUTCD was published in 2009, with revisions in 2012. [ 24 ] The Infrastructure Investment and Jobs Act of 2021 requires the USDOT to update the MUTCD quadrennially, [ 25 ] and the eleventh edition was released in 2023.
This file is in the public domain because it comes from the Manual on Uniform Traffic Control Devices, sign number M6-2, which states specifically on page I-1 that: Any traffic control device design or application provision contained in this Manual shall be considered to be in the public domain .
This file is in the public domain because it comes from the Manual on Uniform Traffic Control Devices, sign number W4-6, which states specifically on page I-1 that: Any traffic control device design or application provision contained in this Manual shall be considered to be in the public domain .
This file is in the public domain because it comes from the Manual on Uniform Traffic Control Devices, sign number W11-2, which states specifically on page I-1 that: Any traffic control device design or application provision contained in this Manual shall be considered to be in the public domain .
This file is in the public domain because it comes from the Manual on Uniform Traffic Control Devices, sign number W6-4, which states specifically on page I-1 that: Any traffic control device design or application provision contained in this Manual shall be considered to be in the public domain .
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Prohibitory and restrictive signs are classified as regulatory signs, as per the MUTCD. Almost all prohibitory signs use a red circle with a slash. Restrictive signs typically use a red circle, as in Europe. Some may be seated on a rectangular white background. The original MUTCD prohibitory and restrictive signs were text-only (i.e. NO LEFT ...