List of highways numbered 18From Wikipedia, the free encyclopedia Route 18, or Highway 18, may refer to: This list is incomplete; you can help by adding missing items. (August 2008) For a list of roads designated "M18", see List of M18 roads.
Route 18, or Highway 18, may refer to: This list is incomplete; you can help by adding missing items. (August 2008) For a list of roads designated "M18", see List of M18 roads.