Live Chat I-55 Community Nearby Traffic MO 21 2024-06-17 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to MO 21 Cedar Hill, MO 8.16 High Ridge, MO 8.53 Eureka, MO 10.56 Interstate highway exits close to MO 21 Exit 266, i44 11.19 Exit 265, i44 11.52 Exit 264, i44 12.16 Interstate highways close to MO 21 i44 map 11.19 i55 map 15.88 i270mo map 20.07 State roads close to MO 21 MO 30 map 1.31 MO 21 map 6.28 MO 109 map 9.90