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| | Encyclopedia: List of noncontiguous Interstates |
 | | Interstates which are meant to have duplicate routes, one on each side of the country, namely I-76, I-84, I-86 and I-88 |
 | | Interstate 690 in Syracuse, New York has a traffic light for one or two weeks each year, for buses to carry Great New York State Fair attendees from parking areas across the road to the fair. |
 | | I-5 crosses the Columbia River from Portland, Oregon to Vancouver, Washington on the Interstate Bridge, a drawbridge. |
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