Introduced by Eisenhower in the 1950s, the freeway system—90 percent of which was paid for by federal funding—may be the country’s greatest-ever gift to itself. While it generally follows standard procedures in terms of signage, routing, and numbering, there are points in the system where things get a little weird. (Via Atlas Obscura)
The Interstate Highways That Don’t Follow the Rules →
Coutesy: http://www.chrisyates.net/