Oklahoma State Highway 66 Oklahoma State Highway 66 State Highway 66 (abbreviated SH-66) is a state highway in the U.S. state of Oklahoma, beginning at U.S. Highway 81 in El Reno and ending at U.S. Highway 60 near White Oak. The highway was designated in 1985 as a replacement for the decommissioned US-66. Although most of the highway follows Historic Route 66, the highway follows US-66's final alignment, joining Interstate 44 through Tulsa and Oklahoma City, while older versions of the route follow various city streets through both cities. The highway has retained its importance for most of its length due to its paralleling
Oklahoma State Highway 2 and SH-10 in Welch, Oklahoma. All signage for SH-2 ends at US-59/SH-10 in Welch. However, the official definition of the highway contains an unsigned concurrency with US-59 to the point where it crosses the state line into Kansas. The northern SH-2, between Vinita and the Kansas state line, was once part of US-73. Until the early 1980s a portion of SH-2 was one of the last unpaved state highways in the Oklahoma road network. The section between the communities of Kosoma, Oklahoma and Stanley, Oklahoma in the Kiamichi River Valley, remained gravel. Its builders during the 1930s and 1940s, in