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 ...

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 ...

The interstate highway system transformed the U.S. economy and American life in the 20th century. High-speed rail can have a similar effect in the 21st century, reindustrializing and reconnecting ...