"The 200-year-old National Road (also known as The National Pike, Cumberland Road, US 40, and Baltimore-Cumberland Turnpike) is often referred to as "The Main Street of America." It was the nation's first federally funded highway and eventually passed through more than 25 cities and towns in Maryland. The 33-mile Maryland portion of the original road was linked with privately constructed turnpikes to extend it to 170 miles in the state. In its early...