through Window Rock, seat of government for the Navajo Nation, as well as near Old Oraibi, which is generally considered the oldest continuously inhabited settlement in North America. Driving SR 264 between Tuba City and Steamboat involves six time zone changes in less than 100 miles (160 km) during daylight saving time. History The route from Tuba City to Window Rock existed as a dirt road as early as 1927. By 1935, portions of the route had been improved. The section between Oraibi and Keams Canyon and the section from northwest of Ganado and the New Mexico border had been improved for travel. By 1938, the route had been improved further to a gravel road. By 1956, a large gap in the road was completed through Hah-Hoh-No-Geh Canyon, just southeast of Tuba City. In previous years, this gap had made the driving the road between Hotevilla and Tuba City impossible. About of the Tuba City to Window Rock road was added to the state highway system as Arizona State Route 264 (SR 264) on July 26. 1960. This section began southeast of Tuba City and ended at a junction with SR 64 in Tuba City proper. By 1961, SR 264 from the SR 64 junction to a point southeast of Tuba City had been paved. Later that year, SR 264 was extended east to the New Mexico border, ending at the beginning of New Mexico State Road 68 (NM 68). Today, NM 68 is known as NM 264, continuing the Route 264 designation east to U.S. Route 491 (US 491) in Yah-ta-hey, New Mexico. Junction list References External links AZ 264 at Arizona Roads 264 Transportation in Coconino County, Arizona Transportation in Navajo County, Arizona Transportation in Apache County, Arizona