I've read an article about the Civil War in America, and there were different names for roads like "Warrenton Turnpike" or simply "Pike", "Smith Lane", "Sudley Road", "dirty track". I wonder what is the difference between them and are those "turnpikes" and "pikes" common only for American Eastern states, because the main meaning of this was a barrier set across a road, or is it used in other parts too.