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| | 50th Anniversary of the Interstate Highway System -Frequently Asked Questions |
 | | In fact, the numbering plan for U.S. numbered highways was the model for the Interstate System—but in mirror image (for example, U.S. 1 is on the East Coast, while I-5 is on the West Coast; U.S. 10 is in the north while I-10 is in the south). |
 | | In general, when a group or individual agrees to clear litter periodically from a stretch of road, the State transportation department (or county or city) provides training to ensure litter is collected safely, along with trash bags, a sign displaying the name of the organization that adopted the highways, reflective vests, and other equipment. |
 | | Although the Federal-Aid Highway Act of 1956 added the words “and defense” to the name of the Interstate System (now the Dwight D. Eisenhower National System of Interstate and Defense Highways), the primary justification for the network was its civilian benefits, such as economic opportunity, safety, relief of congestion, and evacuation of cities. |
| www.fhwa.dot.gov /interstate/faq.htm (7668 words) |
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