the now-abandoned Painted Desert Trading Post. About northeast of the trading post, US 66 crossed over to the south side of I-40 onto County Route 7385. US 66 followed County Route 7385 around the Navajo Trading Post and McCarrell Memorial Cemetery to exit 330. At exit 330, US 66 diagonally crossed I-40 onto an abandoned road heading northeast into Chambers and crossed present-day US 191. US 66 proceeded east on the frontage road from the intersection with US 191, then rejoined I-40. Exit 339 in Sanders used to be an at-grade intersection where US 66 met its child route, US 666. From the intersection, US 666 southbound followed present-day US 191 to Springerville, Safford, Willcox and Douglas, while US 66 and northbound US 666 ran concurrently northeast along present-day I-40. Northeast of exit 341, US 66/US 666 followed Querino Dirt Road and crossed over Querino Canyon on the Querino Canyon Bridge. At exit 346, US 66/US 666 rejoined I-40, and followed the Interstate through Houck and Allentown. Immediately northeast of exit 354, US 66/US 666 followed the south frontage road alongside I-40 into the small hamlet of Lupton. East of Lupton, US 66/US 666 merged back into I-40 and crossed into New Mexico, then continued east towards Gallup. History US 66 is one of the most popular highways in the history of the state of Arizona. It was also once one of the heaviest traveled highways in the state. Often called the "Main Street of America", US 66 has been the subject of a popular song ("(Get Your Kicks on) Route 66") and television show as well as several movies, including the 1940 movie The Grapes of Wrath and the 2006 children's movie Cars. The history of the highway dates back to United States Army expeditions during the mid-19th century and an ancestral highway known as the National Old Trails Road, one of the original transcontinental highways in North America. US 66 itself existed between 1926 and 1985. It was one of the original U.S. Highways in Arizona and, until the arrival of US 60 in 1931, US 66 was one of only two primary transcontinental highways in the entire state (the other was its southern counterpart, US 80). US 66 was used as a means of escape by refugees from the Dust Bowl during the Great Depression, and became an extremely popular tourist highway during the 1950s. The highway