Map of US highway 71 and family
US 71 is represented by the purple line beginning in International Falls MN. Its southern terminus is currently near Krotz Springs LA; the red line extending east of there to Baton Rouge is the historic extent of US 71.
US 171 is the blue line from Shreveport to Lake Charles LA.
US 271 is the blue line beginning in Fort Smith AR. Its southern terminus is currently in Tyler TX; the red line extending south of there to Beaumont is the historic extent of US 271. Also shown in red is its historic routing through Page OK and Mena AR.
US 371 is the blue line from DeQueen AR to Evelyn LA.
US 371 [I] (historic) is the red line from Bemidji to Little Falls MN.