the.com/interstate

America's answer to 'what if we paved the shortest line between everywhere.'

means A highway built to link states or span long distances, designed for fast through-travel rather than local stops.

from Straightforward compound of 'inter-' (between, among), from Latin 'inter,' plus 'state.' The word existed earlier as a general adjective for anything spanning multiple states — commerce, disputes, agreements — before becoming shorthand for the US highway system officially named the 'Dwight D. Eisenhower National System of Interstate and Defense Highways,' built starting in the 1950s.

odd numbers
run north-south, even numbers run east-west
secret purpose
designed partly for Cold War evacuations and missile transport
longest route
I-90 stretches 3,020 miles, Seattle to Boston
three-digit rule
even first digit means it loops around a city
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