 That interchange includes pair of flyovers from both directions of US 460 and a trumpet interchange to the north of Norfolk Southern's Christiansburg District and the business route's interchange with SR 111 (Cambria Street).US 460 bypasses the center of Christiansburg and crosses over the Christiansburg District rail line before meeting the business route again, this time concurrent with US 11 (Roanoke Street), at a diamond interchange just north of US 460's full cloverleaf interchange with I-81, which has collector-distributor lanes through the interchange.The US 460 roadway continues south of I-81 as Parkway Drive, and there are ramps from the southbound I-81 ramp to westbound US 460 and from US 11 to the ramp from eastbound US 460 to southbound I-81.