U.S. Route 70S (US 70S) is an alternative to U.S. Route 70 between the western part of Nashville and Sparta in Tennessee. It runs concurrent with US 70 for several blocks in downtown Nashville. The highway follows Murfreesboro Pike from Nashville to Murfreesboro then heads due east to McMinnville then northeast to Sparta where it ends at its junction with US 70. It was originally designated as U.S. Route 270 in 1926. Route description US 70S begins at a junction with US 70 and SR 24 as the Charlotte Pike, and runs concurrently with SR 1. The road descends to an interchange with I-40, before passing through the community of Bellevue and intersecting SR 251. After this, US 70S enters the urban Nashville area along Harding Pike, intersecting SR 100 and then crossing I-440 as West End Avenue. US 70S and SR 1 merge with US 431 and SR 106 and crosses the I-40 and I-65 freeway as Broadway. At that interchange, the one-way couplet of US 70 and SR 24 meets US 70S, and all these routes continue into downtown Nashville. At the intersection of Rosa Parks Boulevard and Broadway, US 31 and US 41 run concurrently with the other routes on 8th Avenue South and then Lafayette Street, while US 431 splits off with US 31 and US 41 headed north, and US 70 and SR 24 continue east. US 31 eventually continues south, splitting from the other routes. US 70S and SR 1 and US 41 come to an interchange with I-24 near the I-40 interchange, before the three routes leave the Nashville area as Murfreesboro Pike, intersecting SR 155 and passing under the runways of Nashville International Airport. East of the airport, US 70S intersects SR 255, Donelson Pike, and later SR 254 as well as SR 171 (Hobson Pike), as it passes through the suburbs east of Nashville. In Rutherford County, US 70S has an interchange with SR 266 near the airport before passing through Smyrna. The highway then has an interchange with Lee Victory Parkway (SR 102) and I-840 before briefly paralleling the west fork of the Stones River and entering the city of Murfreesboro. U.S. Route 231 and SR 10 briefly run concurrently with the route, and SR 96 intersects it. Southeast of town, US 41 and SR 2 continue south, splitting off from SR 1 and US 70S. As Dr. Martin Luther