In general, U.S. Routes do not have a minimum design standard, unlike the later Interstate Highways, and are not … See more

In 1903, Horatio Nelson Jackson became the first documented person to drive an automobile from San Francisco to New York using only a connection of dirt roads, cow paths, and railroad beds. His journey, covered by … See more

The original major transcontinental routes in 1925, along with the auto trails which they roughly replaced, were as follows:
US 10, US 60, and US 90 only ran about two thirds of the way across the country, while US 1… See more

• U.S. Roads portal
• New England road marking system
• United States Bicycle Route System See more

• Ingram, Tammy (2014). Dixie Highway: Road Building and the Making of the Modern South, 1900–1930. Chapel Hill: University of North Carolina Press. ISBN 9781469615523. See more

• AASHTO Special Committee on U.S. Route Numbering
• U.S. Numbered Highways - 1989 Edition (AASHTO)
• Highway History - Other Articles (Federal Highway Administration)… See more