Live Chat I-90 Community Nearby Traffic US 81 SD 2024-05-18 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to US 81 SD Howard, SD 15.92 Ramona, SD 18.02 Madison, SD 18.58 Interstate highway exits close to US 81 SD Exit 364, i90 36.60 Exit 368, i90 36.84 Exit 357, i90 38.53 Interstate highways close to US 81 SD i90 map 36.60 i29 map 48.68 i229sd map 69.37 State roads close to US 81 SD US 81 SD map 1.51 SD 34 map 3.08 US 14 SD map 40.74