Live Chat I-65 Community Nearby Traffic US 421 IN 2024-05-21 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to US 421 IN Indianapolis, IN 7.01 Whitestown, IN 7.34 Carmel, IN 11.00 Interstate highway exits close to US 421 IN Exit 25, i465in 3.73 Exit 23, i465in 5.71 Exit 129, i65 5.85 Interstate highways close to US 421 IN i465in map 3.73 i65 map 5.85 i74 map 14.64 State roads close to US 421 IN US 421 IN map 2.88 US 52 IN map 4.32 US 31 KY IN map 10.64