AMP: 398 Location: SR 75 and US-191, Four Corners, Greenlee Cty Reassurance shield at the beginning of SR 75, a route that goes from here down to Duncan. AMP: 398 Location: SR 75 and US-191, Greenlee Cty 20 miles to junction US-70 and Duncan AMP: 379 Location: SR 75 and Virden Rd, Greenlee Cty As … Continue reading State Route 75, US-191/SR 78 to US-70