Large US Road map, available? Need to show my tour route
I'd like to purchase a large map that I can show my tour route on. It's a combination of ACA Transamerica sections as well as some routing I picked out myself using Google maps, going from San Diego to Boston.
Basically what I'm looking for is like a large-ish political map, like that had in school, but that shows roads in enough detail that the routes I'm taking would show up. Does such a beast exist? I want to show people the route I'm taking but I'm having real difficulty finding a way to do it.