See the State contact list at http://cms.transportation.org/?siteid=59&pageid=852
AASHTO Center for Environmental Excellence Report - Taking the High Road
U.S. Bicycle Route System
The American Association of State Highway Transportation Officials (AASHTO) is hosting a Task Force to develop a national interstate route system for bicycle routes, with input from States and national bicycle advocacy organizations. The Adventure Cycling Association provides staff support. The Task Force has developed a report and a draft corridor plan.