Oklahoma State Highway 78

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State Highway 78 marker

State Highway 78
Route information
Maintained by ODOT
Length 60 mi (100 km)
Major junctions
South end Texas 78.svg SH 78 at the Texas state line
North end US 377.svgOklahoma State Highway 99.svg US-377/SH-99 in Tishomingo (concurrent with SH-22)
Highway system
Oklahoma State Highway System
US-77 SH-79

State Highway 78 is 60-mile (97 km) long[1] (97 km) state highway in southern Oklahoma. It runs from the Red River (where it crosses into Texas as State Highway 78) to Tishomingo. It has no lettered spur routes.

Route description[edit]

SH-78 crossing the Red River

State Highway 78 enters Oklahoma across the Red River on the State Highway No. 78 Bridge at the Red River, near the unincorporated community of Karma. Near Yuba, SH-78 curves west to head toward Achille, where it meets State Highway 91. It curves back north here, meets State Highway 70E, and then passes through the east part of Durant, where it crosses US-70. In northern Durant, SH-78 has an interchange with the US-69/75 freeway.

Three miles north of US-69/75, SH-78 turns west to head through Cobb and Brown before turning north to meet State Highway 199. It meets SH-22 for the first time at Nida. It then passes through Emet and turns back west at Milburn. It then meets SH-22 for a second time three miles (5 km) east of Tishomingo. It then joins SH-22 into Tishomingo, where it ends at US-377/SH-99.


The road that would become SH-78 was originally commissioned as SH-299 on 1938-11-22.[2] SH-299 was renumbered to SH-78 in its entirety in 1955,[3] most likely to match the route number of TX-78.

Previous Routes[edit]

SH-78 was originally designated as a route from Boise City to the Texas Border.[4] This route became US 385 in 1955.

Junction list[edit]

County Location mi[1] km Destinations Notes
Bryan Karma 0.0 0.0 Texas 78.svg TX 78 Texas state line, southern terminus
Achille 15.9 25.6 Oklahoma State Highway 91.svg SH-91
22.4 36.0 Oklahoma State Highway 70E.svg SH-70E
Durant 27.2 43.8 US 70.svg US-70
27.8 44.7 US 70.svg US-70
30.5 49.1 US 69.svgUS 75.svg US-69/75 Half-folded diamond interchange[5]
32.8 52.8 Oklahoma State Highway 48.svg SH-48 Southern terminus of SH-48
Brown 40.9 65.8 Oklahoma State Highway 199.svg SH-199 Eastern terminus of SH-199
Johnston Nida 44.1 71.0 Oklahoma State Highway 22.svg SH-22
44.3 71.3 Oklahoma State Highway 22.svg SH-22
Milburn 52.2 84.0 Oklahoma State Highway 48A.svg SH-48A
57.4 92.4 Oklahoma State Highway 22.svg SH-22
Tishomingo 60.0 96.6 US 377.svgOklahoma State Highway 99.svg US-377/SH-99 Northern terminus (concurrent with SH-22)
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b Stuve, Eric. "OK-78". OKHighways.com. Retrieved 2007-04-26. [self-published source]
  2. ^ Oklahoma Department of Transportation, Planning & Research Division. "Memorial Dedication & Revision History - SH-22". Retrieved 2007-05-08. 
  3. ^ Official State Highway Map (Map) (1956 ed.). Oklahoma Department of Transportation. 
  4. ^ Official State Highway Map (Map) (1940 ed.). Oklahoma Department of Transportation. 
  5. ^ Google (June 8, 2009). "Oklahoma State Highway 78" (Map). Google Maps. Google. Retrieved June 8, 2009. 

External links[edit]