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Oklahoma State Highway 3E

State Highway 3 marker

State Highway 3
Route information
Maintained by ODOT
Length: 615.0 mi (989.7 km)
Existed: 1939 – present
Major junctions
West end: US-287 / US-385 Colorado state line (concurrent with US-287/385)
  Kilpatrick Turnpike near Oklahoma City
I‑44 in Oklahoma City
I‑40 in Oklahoma City
I‑35 in Oklahoma City
I‑40 in Shawnee
Indian Nation Turnpike in Antlers
East end: AR 32 at the Arkansas state line
Highway system
Oklahoma State Highway System
SH-2 SH-4

State Highway 3 marker

State Highway 3, also abbreviated as SH-3 or OK-3, is a highway maintained by the U.S. state of Oklahoma. Traveling diagonally through Oklahoma, from the Panhandle to the far southeastern corner of the state, SH-3 is the longest state highway in the Oklahoma road system, at a total length of 615 miles (990 km) via SH-3E (see below).

Highway 3 begins at the Colorado state line 19 mi (31 km) north of Boise City, Oklahoma. At this terminus, it is concurrent with US-287/US-385. It remains concurrent with the two U.S. Routes until reaching Boise City, where it encounters a traffic circle which contains five other highways. After the circle, US-385 splits off, and SH-3 overlaps US-287, US-56, US-64, and US-412, though US-56 and US-287 both split off within the next 8 miles (13 km).

In Guymon, US-64 splits off. At Elmwood, US-270 joins US-412, coming from a concurrency with State Highway 23. SH-3 remains concurrent with US-270 through Watonga. In Seiling, US-183 leaves the concurrency but is quickly replaced by U.S. Highway 281. SH-33 joins the roadbed 20 miles (32 km) later.


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