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Citation template for minutes and report from the Special Committee on U.S. Route Numbering of the American Association of State Highway and Transportation Officials Template parameters Parameter Description Type Status year year the year of the meeting, suffixed with a letter for the type (annual, spring or mail ballot) String required page page pages the page or pages of the report/minutes ...
The American Association of State Highway and Transportation Officials (AASHTO) is a standards setting body which publishes specifications, test protocols, and guidelines that are used in highway design and construction throughout the United States. Despite its name, the association represents not only highways but air, rail, water, and public ...
Citation template for minutes and report from the Special Committee on U.S. Route Numbering of the American Association of State Highway and Transportation Officials Template parameters [Edit template data] Parameter Description Type Status year year the year of the meeting, suffixed with a letter for the type (annual, spring or mail ballot) String required page page pages the page or pages of ...
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Through urban areas, at least one routing is to have 16-foot (4.9 m) clearances, but others may have a lesser clearance of 14 feet (4.3 m). Sign supports and pedestrian overpasses must be at least 17 feet (5.2 m) above the road, except on urban routes with lesser clearance, where they should be at least 1 foot (30 cm) higher than other objects.
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The primary US guidance is found in A Policy on Geometric Design of Highways and Streets published by the American Association of State Highway and Transportation Officials (AASHTO). [2] Other standards include the Australian Guide to Road Design Archived 2011-11-09 at the Wayback Machine , and the British Design Manual for Roads.
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