AMP: 2 Location: Grand Ave and Mariposa Rd, Nogales About a mile later, we’ll approach SR 189. Turn left at the light for that route, which is the truck route to the border and the connection to the Mexican tollway system AMP: 2 Location: Grand Ave and Mariposa Rd, Nogales Weird place for a reassurance … Continue reading Interstate 19 Business, SR 82 to SR 189