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the offuce of public roads was established and successor in 1893
http://www.greatachievements.org/?id=3786 -
the lincoln highway is know as I-80 or I-95 https://www.fhwa.dot.gov/infrastructure/lincoln.cfm
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state highways engineers across the county signage based on shapes
http://www.greatachievements.org/?id=3786 -
the highway safty act establishes the national highways to reduce traffic accidents