routes of US 191. US 191 Bus. begins at the Douglas port of entry. Heading northeast, US 191 takes on the name Pan American Avenue. The route is lined with several businesses and acts as the western boundary to downtown Douglas. Several large slag piles can be seen from US 191 to the west at the former location of the Douglas smelter. A number of warehouses and industrial structures are also located west of the highway. US 191 Bus. curves slightly in front of the Douglas Police Station (former train station) before terminating at an intersection with SR 80 and Historic US 80 16th Street and G Avenue. Westbound SR 80 provides a direct connection to US 191, which begins just over a mile west of town. Major intersections U.S. 191 Wye route U.S. Route 191 Wye (US 191Y) is an unsigned auxiliary route of US 191 that runs from exit 355 of I-10 to US 191; it is also known as Page Ranch Road. It serves as a shortcut for people traveling from westbound on I-10 to northbound on US 191 and from southbound on US 191 to eastbound on I-10. Major intersections Morenci mine temporary route U.S. Route 191 Temporary (US 191 Temp.) is the designation of of the route of US 191 through the Morenci mine. The route was previously designated as US 666 Temp. until 1992, when US 666 and all its related routes in Arizona were renumbered to extensions and special routes of US 191. This designation was created in 1974 for the rerouted section of the road, then US 666, that had to be moved farther away from the Morenci mine due to its growth. US 191 Temp. begins at Zorilla Street in Clifton. Heading west, US 191 Temp. travels through Clifton's Chase Creek District before ascending the side of the Chase Creek Valley. The road then turns around at the end of the valley with a hairpin turn, where the original routing of the road (then US 666) can be seen leaving the current roadway and heading toward the mine. The road continues to ascend the valley in a southern direction until it arrives in Morenci. Here, the route turns north at the intersection of Burro Alley and Coronado Trail. Originally, the route traveled straight at this intersection and went through Morenci, but a bypass was built in 1972. After leaving Morenci, the