The section of Miracle Mile West stretching between Miracle Mile and the Southern Pacific overpass was signed as Business Loop 10, State Route 84A and State Route 93 in the 1960s. It is now marked as the southern leg on State Route 77, the new designation for US 80-89 north out of Tucson. The Business Loop was dropped in 1998, as many of the business entrepreneurs in the area were practicing a very-old roadside business indeed.
Those last sixteen words violate at least three Wikipedia policies. I could "fix" it. I won't. And as far as I know--not firsthand!--"business" goes on as usual.