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| | New Georgia Encyclopedia: Interstate Highway System (Site not responding. Last check: 2007-10-23) |
 | | The interstate highway system was built to consistent design standards requiring limited access, wide lanes, paved shoulders, at least four lanes, and accommodation for speeds of up to seventy miles per hour. |
 | | I-516 is a spur highway in Savannah, and I-520 is Augusta's perimeter highway. |
 | | Since their construction in the 1960s and 1970s, Atlanta's interstate highways have helped fuel urban sprawl, first around the northern I-285 perimeter and Interstates 75 and 85 north of the city in the 1960s, 1970s, and 1980s. |
| www.georgiaencyclopedia.org /nge/Article.jsp?id=h-2423 (704 words) |
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