Great River Road errors:
Louisiana to come...
Supposedly the GRR uses old US 61 thru Lula and Tunica to Walls MS, but I can't find signage on either alignment.
Memphis from south to north: US 61, BB King Boulevard (US 64/70/79), Patterson Avenue, Main Street, Beale Street, Riverside Drive, Jefferson Avenue, Front Street, Willis Avenue, Island Drive, Mud Island Road, 2nd Street, Whitney Avenue, US 51
The GRR
is signed in Missouri south from Perryville to the Arkansas line. It seems to follow US 61 except maybe at Kelso (I can't find any signs on either the old or the new alignment).
The GRR
is signed in Missouri north from Hannibal to the Iowa line. It follows I-72, US 61, 168, US 61, US 61 Bus, B, US 61 Bus, and US 61.
IL GRREDu seems to be unsigned; shields begin in Wisconsin at the state line.
The GRR
uses old US 61 thru Camanche IA.
The GRR
uses Mud Lake/Circle Ridge Roads east of Sherrill IA.
The GRR
uses CR 42, not MN 101 south of Elk River.