Live Chat I-75 Community Nearby Traffic I 75 exit 21 2024-04-26 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to I-75 Exit 21 South Rockwood, MI 7.47 Monroe, MI 8.92 Carleton, MI 11.67 Interstate highway exits close to I-75 Exit 21 Exit 21, i75 2.35 Exit 20, i75 2.55 Exit 18, i75 5.08 Interstate highways close to I-75 Exit 21 i75 map 2.35 i275mi map 2.54 i94 map 27.70 State roads close to I-75 Exit 21 NHS HIGH PRIORITY CORRIDORS 5 map 2.20 US 24 MI map 5.09 MI 125 map 6.32