Here's the Surprising Logic Behind America's Interstate Highway Numbers
Map of the US highway system
American Development and the Interstate Highway System
![Interactive map of the US Interstate Highway System (made by me [OC]) : r/MapPorn](https://external-preview.redd.it/zIHAft2aw2aWOahFKJVAJPk3r_s1XcvLvi8jTwhOwv4.jpg?width=640&crop=smart&auto=webp&s=547bc9dbf4d091c905c4fd2a98658955c53c1d0c "Interactive map of the US Interstate Highway System (made by me [OC]) : r/MapPorn")
Interactive map of the US Interstate Highway System (made by me [OC]) : r/MapPorn
National Highway System (United States) - Wikipedia
United States Numbered Highway System | Intertropolis & Routeville Wiki | Fandom
Renewing the National Commitment to the Interstate Highway System: A Foundation for the Future | The National Academies Press
United States Numbered Highway System - Wikipedia
File:Interstate Highway status unknown date.jpg - Wikimedia Commons
File:Interstate Highway status September 30, 1976.jpg - Wikimedia Commons
Federal Highway System, United States
American Highways 101: Visual Guide to U.S. Road Sign Designs & Numbering Systems - 99% Invisible
The Math Inside the US Highway System – BetterExplained
United States Numbered Highways
How To Navigate The Interstate System Without A Map, A Compass, Or A GPS | Carscoops
Office of Highway Policy Information - Policy | Federal Highway Administration
The National Highway System: A Commitment to America's Future | FHWA
Interstate Highway System - Wikipedia
U.S. Route 100 | Intertropolis & Routeville Wiki | Fandom
The Evolution of the Interstate | Geotab
National Highway System (United States) - Wikipedia
9 Things You May Not Know About the U.S. Interstate Highways | From The Kitchen Cabinet
Highway
THE INTERSTATE HIGHWAY SYSTEM AT 50 / America in fast lane with no exit / Freeways have changed our way of life and given birth to new industries
