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Various color schemes for mandatory signs. See image description page for large image and legend. The design of mandatory signs varies widely, since the MUTCD does not specify their use. [1] Rather, the MUTCD's equivalent are classified as regulatory signs. Some countries use simple arrows with the text "ONLY" or its equivalent underneath.
Most warning signs are diamond-shaped and yellow or red-bordered triangular warning signs; some warning signs may be fluorescent yellow-green in order to draw extra attention. There are a few exceptions to this: Pentagonal signs are used in school zones in the United States, Liberia, and many areas in Canada.
11th edition of the MUTCD, published December 2023. In the United States, road signs are, for the most part, standardized by federal regulations, most notably in the Manual on Uniform Traffic Control Devices (MUTCD) and its companion volume the Standard Highway Signs (SHS).
Roads can be motorways, expressways or other routes. In many countries, expressways share the same colour as primary routes, but there are some exceptions where they share the colour of motorways (Austria, Liechtenstein, Hungary, Switzerland, Spain, Sweden) or have their own colour (the countries comprising former Yugoslavia employ white text on blue specifically for expressways).
The Manual on Uniform Traffic Control Devices for Streets and Highways (usually referred to as the Manual on Uniform Traffic Control Devices, abbreviated MUTCD) is a document issued by the Federal Highway Administration (FHWA) of the United States Department of Transportation (USDOT) to specify the standards by which traffic signs, road surface markings, and signals are designed, installed ...
3. Keebler Fudge Magic Middles. Neither the chocolate fudge cream inside a shortbread cookie nor versions with peanut butter or chocolate chip crusts survived.
The first signs in metric in the United States were posted on February 12, 1973, on Interstate 71 in Ohio. [108] Gasoline and diesel fuel are sold by the U.S. gallon, and fuel economy is rated in miles per gallon (MPG). In most other countries, using the metric system, fuel consumption is measured in liters per 100 kilometers or kilometers per ...
Since 2016, on width and height limit signs both metric and imperial measurements are used (metres and feet & inches), however older signs still show imperial-only measurements [citation needed]. Weight limits have been expressed in metric tonnes since 1981, but signs continued to use an upper case "T" until 2011.