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State highways are of varying standards, capacity, and quality. Some state highways become so heavily traveled they may get upgraded to Interstate Highway standards. Others are more lightly traveled and have low capacity. Many state highway markers are designed to suggest the geographic shape of the state or some other state symbol such as its ...
Example of an original U.S. Route shield, with the state name of "Michigan" and route number of "27" displayed in the original block font. The original design of the shield was presented in the January 1927 edition of the Manual and Specifications for the Manufacture, Display, and Erection of U.S. Standard Road Markers and Signs, the precursor to the Manual on Uniform Traffic Control Devices ...
Since the policy on numbering and designating US Highways was updated in 1991, AASHTO has been in the process of eliminating all intrastate U.S. Highways under 300 miles (480 km) in length, "as rapidly as the State Highway Department and the Standing Committee on Highways of the American Association of State Highway and Transportation Officials ...
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).
[citation needed] The reverse happened with U.S. Route 57, originally a Texas state highway numbered to match Mexican Federal Highway 57. [9] In the 1950s, the numbering grid for the new Interstate Highway System was established as intentionally opposite from the US grid insofar as the direction the route numbers increase.
The Interstate shield is the only trademarked highway marker in use in the United States (being registered by the American Association of State Highway and Transportation Officials, the trade association of the states' departments of transportation and also a standards organization for highway engineering), and the U.S. Route shield was ...
The Interstate Highway System gained a champion in President Dwight D. Eisenhower, who was influenced by his experiences as a young Army officer crossing the country in the 1919 Motor Transport Corps convoy that drove in part on the Lincoln Highway, the first road across America. He recalled that, "The old convoy had started me thinking about ...
Highway symbols and markers Every state in the U.S. and province in Canada has different markers for its own highways, but uses standard ones for all federal highways. Many special highways – such as the Queen Elizabeth Way , Trans-Canada Highway , and various auto trails in the U.S. – have used unique signs.