U.S. Route 16A

U.S. Route 16A (US 16A) is a scenic United States highway, which divides from U.S. Route 16 in the Black Hills of South Dakota. The highway's western terminus is a junction with US 16 and US 385 in Custer, South Dakota. The eastern terminus is at an interchange with US 16 called the Keystone Wye south of Rapid City, South Dakota.

Route description

The route passes through Keystone, South Dakota; Norbeck Wildlife Refuge; Mount Rushmore National Memorial; and Custer State Park (including State Game Lodge and Legion Lake); before rejoining the parent highway.

US 16A is famous for its scenic, one-lane tunnels aligned to frame the faces on Mount Rushmore, its "pigtail bridges", and its sections of divided highway but with single (and narrow) lanes on each roadway. It is the only route which can be used to drive through Custer State Park without having to pay an entrance fee for the park, provided the traveler does not stop in the Park.

Portions of US 16A are known as the Iron Mountain Road. The route includes most of the tunnels on the South Dakota state highway system, including the only four-lane tunnel in the state, just north of Keystone. Part of the highway is also a boundary of the Black Elk Wilderness. The Iron Mountain portion of the road is not maintained in the winter. The road, like several other scenic roads in the Black Hills, was originally laid out by Governor Peter Norbeck, specifically to create a very scenic, slow-speed road for tourists. The section of US 16A from SD 89 to SD 244 is known as the Peter Norbeck Memorial Byway in honor of the governor. At the highest point of the byway, on the summit of Iron Mountain, there is a small memorial to Governor Norbeck.

U.S. Route 29 in Maryland

U.S. Route 29 (US 29) is a north–south United States highway that runs for 1,036 miles (1,667 km) from the western suburbs of Baltimore, Maryland, to Pensacola, Florida. In the U.S. state of Maryland, US 29 is a major highway that emerges from Washington D.C. and runs north into eastern Montgomery County, stretching over 25.859 miles (41.62 km) through the state and terminating at Maryland Route 99 outside of Ellicott City. It serves the cities of Columbia and Ellicott City and provides the westernmost north–south route between Washington D.C. and Baltimore.

US 29 in Maryland was a late addition to the United States Numbered Highway System fabricated in 1926, beginning along a corridor once known as Maryland Route 27. Since its redesignation, it has been realigned and upgraded many times, now containing freeway and expressway sections.

Route description

Georgia Avenue and Colesville Road

US 29 emerges from Washington, D.C. along Georgia Avenue. Running alongside the Jessup Blair Park it intersects MD 410, the East–West Highway, just outside the D.C. border. It then meets the northern terminus of MD 384 and the southern terminus of MD 97 at a four-way intersection in Silver Spring; US 29 subsequently becomes Colesville Road, taking over from MD 384, while MD 97 continues as Georgia Avenue.

Bannered routes of U.S. Route 220

Several bannered routes of U.S. Route 220 exist. In order from south to north they are as follows.

Existing

Candor–Seagrove alternate route

U.S. Route 220 Alternate (US 220 Alt), established in 1979, is an 27.5-mile (44.3 km) route that follows the old US 220 route through Candor, Biscoe and Star. In 1997, it was extend further north through Seagrove to its current terminus near Ulah. In 2008, the US 220 Alt was temporary extended south 7.9-mile (12.7 km) to NC 73, while mainline US 220 was on new freeway filling in for Future I-73/I-74; In 2013, mainline US 220 was moved back on that section. Predominantly a two-lane rural highway, it begins at exit 41 interchange from I-73/I-74/US 220 and ends at US 220 Bus, just 200 feet (61 m) from exit 68.

Asheboro business loop

U.S. Route 220 Business (US 220 Bus) was established in 1966 when mainline US 220 was rerouted onto new freeway bypass from south of Ulah to Vision Drive, in Asheboro. In 1972, US 220 Bus replaced some of the mainline along Vision Drive as new freeway was built further north towards US 311. In 1974, US 220 Bus was removed from Vision Drive and continued north along the old mainline route, through Randleman, to Level Cross. In 1982, US 220 Bus was adjusted at Level Cross, replacing some of the mainline to its current terminus with US 220 interchange. US 220 Bus is two-lane along its routing outside Asheboro and three to four-lane in Asheboro. The entire route is in Randolph County.