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- Click here for zoomable Mapquest road map of Oahu These pages have exit lists for Hawaii's four freeways, all of which are on Oahu: Interstate H-1 Interstate H-2 Interstate H-3 Interstate H-201/state route 78 Each exit list is on a separate page, but also has links at the bottom to the other exit lists, and back to this page Basic route information, including some material from the previous ...users.erols.com/ovoss/oahu-freeways.htm