Yahoo! Groups: northeastroads - Northeastern U.S. Roads  
   Covers the Northeast Corridor (Megalopolis), primarily from Pennsylvania north to the Canadian border, and surrounding areas.
   http://groups.yahoo.com/group/northeastroads

Yahoo! Groups: seroads - Southeast Roads and Transport  
   Covers the area in the United States, from the Mason-Dixon line south to Florida and west to the Mississippi River.
   http://groups.yahoo.com/group/seroads

Yahoo! Groups: Transportation  
   Collection of the dozens of related discussion groups.
   http://dir.groups.yahoo.com/dir/Business___Finance/Transportation

Yahoo! Groups: Travel  
   Includes a few relevant groups.
   http://dir.groups.yahoo.com/dir/Recreation___Sports/Travel

Ohio Valley Roads BB  
   Covers road hobbyist meeting schedules and other various related subjects.
   http://www.cahaltech.com/roadsbb/

Roads and Travel  
   Covers general subjects. Wisconsin, U.S. focus.
   http://www.dajensen-family.com/forum/

Roadgeeks (Un)Anonymous' Journal  
   Weblog predominantly for road trip itineraries.
   http://www.livejournal.com/community/roadgeeks/

Calrog.com Forum  
   Covers general topics. Based in California, U.S.
   http://www.calrog.com/forums/

Hit The Road!  
   Forum divided into many topics.
   http://roadgeeks.proboards29.com/

Roadgeek Forums  
   General discussion.
   http://www.roadgeek.us/forums/

The I-95 Travel Forums  
   Covers various topics about the highway in the U.S. and nearby services.
   http://www.travelriver.com/forum/