S bridge

The next bridge, four and a half miles east from New Concord on U.S. Route 40, is found at the intersection of US 40 and Peter's Creek Road.

Continuing eastward, the next bridge may be found a short distance from US 40 on Manilla Road.

The next "S" bridge is 1.5 miles (2.4 km) east of Cambridge along US 40 at its intersection with Old National Road and has fallen into considerable disrepair.

[3] These four bridges were constructed as a part of the original National Road, which was built circa 1825.

The Linn Cove Viaduct on the Blue Ridge Parkway in modern example that snakes around Grandfather Mountain in North Carolina.