U.S. Highway 16 Business (US 16 Bus.) in Newcastle, Wyoming, is mainline US 16 signed as a business route. It includes West Main Street east of US 16 Truck and South Summit Street east of West Main and North Summit streets.
U.S. Highway 16 Truck (US 16 Truck) in Newcastle, Wyoming, runs south of mainline US 16. It begins at West Main Street between Quarter Horse Drive and Sixth Avenue, directly across from Seventh Avenue, and Divide Avenue and South Summit Street.
Former Custer–Keystone alternate route
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U.S. Highway 16 Truck (US 16 Truck) in Rapid City, South Dakota, runs from US 16 in the southern portion of the city to Interstate 90 (I-90)'s exit 61 on the city's eastern boundary.[4] The route, recognized by the American Association of State Highway and Transportation Officials as U.S. Highway 16 Bypass (US 16 Byp.), was established in 1989,[5] and its relocation eastward was approved in 2005.[6] While not reflected in these records, the route is signposted along I-90 westward to I-190 and US 16 at I-90's exit 57.