Some shampoos cause a tingling sensation. Scalp tingling may occur as a result of an allergy to a hair product. Some people might also experience scalp tingling from excessive scalp picking and scratching. People who experience regular migraines often complain of a tingling scalp.
While a few of the buildings in Radiator Springs are exact replicas of landmarks along Route 66, most of the businesses populated and operated by the automotive characters in the movie are a pastiche of places found along the fading but still popular road.
If Radiator Springs were a single point located at Peach Springs, Arizona, the rail line is the Santa Fe (the line is still in use, although the train does not stop) and the wrong turn is in Seligman. This point is the eastern gateway to a lengthy section where US 66 runs largely parallel to (but nowhere near) I-40.