When Were Interstates Invented
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The 5 Longest Interstates and How They Were Built | National Express
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Interstate highway system
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Before there were interstates
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History of the us highway system
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Map of the U.S. Interstate Highway System - The Interstate Highway Act
Interstate Highway System - Wikipedia
The 5 Longest Interstates and How They Were Built | National Express
What was road travel like before the Interstate Highways were built?
Visualizing the Footprint of Highways in American Cities - Visual
National System of Interstate Highways - 1955 | The Saturday Evening Post
Google Images
National Road: America's First Interstate | HistoryNet