The Natchez Trace Parkway
is limited to 55' combined length. Recreational Vehicles - Natchez Trace Parkway
State Route 155, mostly designated the Briley Parkway
, is a beltway around Nashville. It doesn't have any RV restrictions and is used by trucks and buses.
This from Woodalls:
"TENNESSEE: Maximum RV width 102 in.; maximum motorhome length 45 ft.; maximum trailer length 40 ft.; maximum RV height 13.5 ft.; maximum combined length for two- or three-vehicle combination 65 ft. Overnight parking in rest areas allowed unless posted. RV Safety Requirements: Trailers over 3,000 lbs.: trailer brakes, breakaway switch, safety chains (chains not required on gooseneck fifth-wheel trailers). Driving Laws: Wipers on/headlights on. Right turn on red allowed, unless posted otherwise. More Information: Tennessee Highway Patrol, 1150 Foster Ave., Nashville TN 37249-1000. Emergency number: 911, (615) 741-2069; *THP or *847 on cellular phones."
Rules of the Road