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 38 originally given to an alignment from SH-58 in Carrier south to US-60 and SH-15 (now US-412). The majority of this route had been reassigned to SH-45, with the remainder being added to SH-132, by 1963. The road that is now SH-38 was added to the state highway system in late 1961 to early 1962 as SH-35. When the SH-38 designation was freed up in 1962, SH-35 was renumbered to SH-38. No further changes to the route have occurred since then. Oklahoma State Highway 38 State Highway 38 (abbreviated SH-38) is a state highway in the U.S. state of Oklahoma. It