Discovered the U.S. 6 Tourist Association Site and those guys seem to really have their stuff together with respect to promotion, tourism, and preservation. They seem to have a good model for any group to follow in promoting and preserving their favorite historic two lane highway.
http://www.route6tour.com/ (http://www.route6tour.com/)
Jim
Here are several other US Highway Associations:
U.S. Highway Associations (http://www.americanroads.us/ushighwayassoc.html)
... and here are some modern auto trail associations:
Auto Trail Associations (http://www.americanroads.us/autotrailassoc.html)