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| | Interstate 380 |
 | | On December 24, 1968, it was given Interstate status from I-280 to the San Francisco airport. |
 | | I-380 was originally planned to extend to Cedar Falls (in fact, the 1978 Federal Route Log lists I-380 as 79.56 miles), but in 1982 the city of Waterloo traded those funds in for other projects (per the Interstate Substitution ("trade-in") rules established in 1973). |
 | | On Nov. 10, 1958, AASHO approved Iowa's interstate system, but specified that the superfluous I-380 designation be removed. |
| www.kurumi.com /roads/3di/i380.html (604 words) |
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