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 17A of the highway belongs to Garvin County, while land south of the highway falls into Murray County. The route ends at an intersection with US-77 south of Wynnewood. SH-17A first appeared on the 1983 official state map. The highway's route was identical to the present-day route; no changes have occurred since its commissioning. Oklahoma State Highway 17A State Highway 17A (SH-17A) is a long long state highway in south-central Oklahoma. It connects Interstate 35 (I-35) to U.S. Route 77 (US-77) near Wynnewood. It does not connect to its implied parent, State Highway 17. SH-17A was established around 1982, and has