At least 15 special routes of U.S. Route 16 (US 16) have existed, including four in Michigan. __TOC__

Newcastle business route

U.S. Highway 16 Business (US 16 Bus.) in

Newcastle, Wyoming Newcastle is a city in and the county seat of Weston County, Wyoming, Weston County, Wyoming, United States. The population was 3,374 at the 2020 United States Census, 2020 census. Geography Newcastle is situated at the southwest edge of the B ...

, 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.

Newcastle truck route

U.S. Highway 16 Truck (US 16 Truck) in

, 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

Custer–Keystone alternate route

U.S. Highway 16A (US 16A) is a scenic U.S. Highway that is an

alternate route An official alternate route is a special route in the United States that provides an alternate alignment for a highway. They are loop roads and found in many road systems in the United States including the U.S. Highway system and various stat ...

for US 16. It splits from US 16 in the

Black Hills The Black Hills is an isolated mountain range rising from the Great Plains of North America in western South Dakota and extending into Wyoming, United States. Black Elk Peak, which rises to , is the range's highest summit. The name of the range ...

of the southwestern part of the U.S. state of

South Dakota South Dakota (; Sioux language, Sioux: , ) is a U.S. state, state in the West North Central states, North Central region of the United States. It is also part of the Great Plains. South Dakota is named after the Dakota people, Dakota Sioux ...

. The highway's western terminus is an

intersection In mathematics, the intersection of two or more objects is another object consisting of everything that is contained in all of the objects simultaneously. For example, in Euclidean geometry, when two lines in a plane are not parallel, their ...

with US 16, US 385, and South Dakota Highway 89 (SD 89) in

Custer George Armstrong Custer (December 5, 1839 – June 25, 1876) was a United States Army officer and cavalry commander in the American Civil War and the American Indian Wars. Custer graduated from the United States Military Academy at West Point ...

. The eastern terminus is at an

interchange Interchange may refer to: Transport * Interchange (road), a collection of ramps, exits, and entrances between two or more highways * Interchange (freight rail), the transfer of freight cars between railroad companies * Interchange station, a rai ...

with US 16 called

Keystone Wye Keystone Wye is an interchange of U.S. Route 16 (US 16) and US 16A located in the Black Hills of South Dakota, featuring two unique structural glued laminated timber bridges. The Keystone Wye is a three-level Directional T int ...

south of

Rapid City Rapid City is the county seat of Pennington County, South Dakota, United States. It is located on the eastern slope of the Black Hills in western South Dakota and was named after Rapid Creek, where the settlement developed. It is the second-mo ...

. Portions of US 16A are known as the Iron Mountain Road, after the mountain it summits.

Hill City bypass route

Hill City truck route

U.S. Route 16 Truck (US 16 Truck) in

Hill City, South Dakota Hill City is the oldest existing city in Pennington County, South Dakota, United States. The population was 872 at the 2020 United States Census, 2020 census. But as of the 2024 census, the population is now over 1,000. Hill City is located sout ...

, runs east of mainline US 16/US 385 along Walnut Avenue and is also overlapped with US 385 Truck. It begins at Main Street north of Pond Court, then runs alongside the George S. Mickelson Trail. Across the street from MacGregor Street the street name changes to Railroad Avenue for the South Dakota State Railroad Museum and the former

Chicago, Burlington and Quincy Railroad The Chicago, Burlington and Quincy Railroad was a railroad that operated in the Midwest, Midwestern United States. Commonly referred to as the Burlington Route, the Burlington, CB&Q, or as the Q, it operated extensive trackage in the states of ...

depot, which serves the

Black Hills Central Railroad The Black Hills Central Railroad is a heritage railroad that operates in Keystone, South Dakota, United States. The railroad was added to the National Register of Historic Places on February 5, 2003. It currently operates the ''1880 Train'' on ...

. The name Walnut Avenue is revived as "North Walnut Avenue" as US 16 Truck/US 385 Truck ends at East Main Street.

Rapid City business loop

Rapid City truck route

U.S. Highway 16 Truck (US 16 Truck) in

Rapid City, South Dakota Rapid City is the county seat of Pennington County, South Dakota, United States. It is located on the eastern slope of the Black Hills in western South Dakota and was named after Rapid Creek (South Dakota), Rapid Creek, where the settlement deve ...

, runs from US 16 in the southern portion of the city to

Interstate 90 Interstate 90 (I-90) is an east–west transcontinental freeway and the longest Interstate Highway in the United States at . It begins in Seattle, Washington, Seattle, Washington, and travels through the Pacific Northwest, Mountain states, Mou ...

(I-90)'s exit 61 on the city's eastern boundary. The route, recognized by the

American Association of State Highway and Transportation Officials The American Association of State Highway and Transportation Officials (AASHTO) is a standards setting body which publishes specifications, test protocols, and guidelines that are used in highway A highway is any public or private road ...

as U.S. Highway 16 Bypass (US 16 Byp.), was established in 1989, and its relocation eastward was approved in 2005. While not reflected in these records, the route is signposted along I-90 westward to

I-190 Interstate 190 may refer to the following Interstate Highways in the United States related to Interstate 90: *Interstate 190 (Illinois), a spur into Chicago's O'Hare International Airport *Interstate 190 (Massachusetts), a spur from Worcester to Le ...

and US 16 at I-90's exit 57.

Wall–Kadoka alternate route

U.S. Highway 16A (US 16A) is the former designation of SD 240, serving

Badlands National Park Badlands National Park () is a List of national parks of the United States, national park of the United States in southwestern South Dakota. The park protects of sharply Erosion, eroded buttes and Pinnacle (geology), pinnacles, along with the l ...

Watertown business loop

Michigan

References

{{reflist *16 16 16 16