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The United States Interstate Highway System was designed so that even-numbered routes are east-west highways.
Any even numbered Interstate Highway in America runs east and west. In Oklahoma, that would be I40, and I44.
The interstate highway system was designed to be used as military runways.
Increased suburbanization is the development that resulted from the construction of the interstate highway system.
Late 1950s under president Eisenhower. The full name of the system is "The National Defense and Interstate Highway System".
There are several state and county roads with that number, and there's Interstate 81.
As of 2012, the US interstate highway system includes almost 50,000 miles.
Dwight Eisenhower was President of the US when the Interstate highway system was formed.
The National Defense Highway System is usually called the Interstate Highway System or the Eisenhower Highway System.
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