. . . "I-19 BL" . . "I\u201119" . . . . "102080.0" . . "I-19" . . . . . "I-19 Business Route" . . ":Interstate 19#Sahuarita to Tucson loop" . . . "I-19 Business" . "I" . . "kilometers instead of miles" . "Interstate 19" . "19" . . . . "State Business Route 19" . "South" . "Interstate_19#Nogales_loop" . "Interstate 19" . "Interstate 19#Business routes" . . "North" . . . . "Interstate 19#Sahuarita to Tucson loop" . . "Interstate 19 Business" .