Indiatimes

The number logic behind the United States’ highways, and how travellers can use it

The United States' numbered highway system, established in 1926, unified travel with a logical numbering convention for US Highways and later the Interstate Highway System. These interconnected routes ...
MSN による配信

The number logic behind the United States’ highways, and how travellers can use it

The United States’ system of numbered highways is a foundational part of the country’s transportation network. Composing multiple tiers, such as Interstate Highways, US Highways, state highways, and ...
Jalopnik

America's Highway Numbering System Is Hiding A Giant Math Puzzle

Ever wondered how the highway and interstate numbers came to be? What do they even mean if they mean anything at all? Behind those numbered shields displayed on the signs is a mathematical logic grid ...