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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).
State highways in 1970: primary in red and secondary in purple. Primary State Highways were major state highways in the U.S. state of Washington used in the early 20th century. They were created as the first organized road numbering system in the state in stages between 1905 and 1937 and used until the 1964 state highway renumbering. These ...
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 ...
The system spans 8.5% of the state's public road mileage, but carries over half of the traffic. [2] [3] All other public roads in the state are either inside incorporated places (cities or towns) or are maintained by the county. [4] The state highway symbol is a white silhouette of George Washington's head (whom the state is named after).
The U.S. state of Washington first required its residents to register their motor vehicles in 1905. Registrants provided their own license plates for display until 1915, when the state began to issue plates. [2] As of 2023, plates are issued by the Washington State Department of Licensing. Front and rear plates are required for most classes of ...
These were private organizations, and the system of road marking at the time was haphazard and not uniform. In 1925, the Joint Board on Interstate Highways , recommended by the American Association of State Highway Officials (AASHO), worked to form a national numbering system to rationalize the roads.
Most state-owned roads and many arterial roads in the state use Botts' dots as the delineation between lanes. They are also used for the dashed marking in passing areas. More recently, Botts' dots have been used in the snow-free areas of Alabama, Florida, Louisiana, Mississippi, Nevada, Georgia, Washington, and Texas.
Yellow road markings separating lanes in Austria, 1990. They were replaced with regular white road markings starting from 1995. In the Netherlands, Germany, Sweden, and the UK, so-called "naked roads" have been trialed, whereby all visible road markings, kerbs, traffic lights, and signs are removed, on urban roads.