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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 ...
In Louisiana, parish roads exist in place of county highways, as counties in that state are called parishes. Alaska also has no counties, and all roads are maintained at the national, state or municipal level. In some states, such as Massachusetts, county roads are now administered by regional entities, [4] and both Connecticut and Rhode Island ...
Image:US map - geographic.png, a geographical map. On Wikimedia Commons, a free online media resource: commons:Category:Maps of the United States, the category for all maps with subcategories. On Wikipedia itself: Category:Maps of the United States for maps of all varieties by subcategory. Category:Geography of the United States, for general ...
Note that the "Navigable Waters of the United States" listed in 33 CFR 329 are different than those listed as "Waters of the United States" in 33 CFR 328, which is the Clean Water Rule. However, all Navigable Waters, plus those considered navigable-in-fact are included in the general "Waters" definition.
Road maps often distinguish between major and minor thoroughfares (such as motorways vs. surface streets) by using thicker lines or bolder colors for the major roads. [12] Printed road maps commonly include an index of cities and other destinations found on the map; smaller-scale maps often include indexes of streets and other routes.
Traffic is required to keep to the right, known as a right-hand traffic pattern. The exception is the US Virgin Islands, where people drive on the left. [2] Most states in the United States enforce priority to the right at uncontrolled intersections, where motorists must yield to the right. [3]
These primary highways are assigned one- or two-digit route numbers, whereas their associated auxiliary Interstate Highways receive three-digit route numbers. Typically, odd-numbered Interstates run south–north, with lower numbers in the west and higher numbers in the east; even-numbered Interstates run west–east, with lower numbers in the ...
The highway system of the United States is a network of interconnected state, U.S., and Interstate highways. Each of the fifty states, the District of Columbia, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands, and the U.S. Virgin Islands own and maintain a part of this vast system, including U.S. and Interstate highways, which are not owned or maintained at the federal level.