Across the islands of Hawaii, the speed limits are notoriously low. The limits on the freeways are usually 55 to 60 mph. Thanks to Honolulu’s often narrow and winding highways, high-speed driving is not advised. On some roads even 30 mph is seen as too fast. Watch out for the 35-mph S-curve on the H-1 Interstate heading eastbound, between the 18 and 19 exits, as well as speed enforcement who often patrol in unmarked police cars. Search rental cars on KAYAK