Rapid City SD to Sheridan WY: I 90 West, I 190 South, local roads, US 16 West, US 16 Alternate West, SD 244 West to Mt Rushmore
SD 244 East, US 16 Alternate West, SD 743 West, SD 87 West, US 16 West, I 90 West to Sheridan WV
US 16 from Rapid City to Custer SD has been significantly upgraded over the years. The Truck route east of town is hardly needed except to keep the largest trucks off a few blocks in downtown Rapid City.
There are gates on US 16 and I 90 for closing the highways with warning signs.
Counties: Wyoming, Sheridan, for a new total of 961.