Oklahoma State Highway 20

State Highway 20
Route information
Maintained by ODOT
Length:	143.8 mi (231.4 km)
Major junctions
West end:	SH-18 near Ralston
East end:	MO-43 at the Missouri state line (concurrent with AR-43)
Highway system
Oklahoma State Highways Oklahoma turnpike system ← SH-19 SH-22 →

State Highway 20 (abbreviated SH-20 or OK-20) is a highway in northeastern Oklahoma. Its eastern terminus is at the corner of Oklahoma, Arkansas, and Missouri near Southwest City, Missouri; its western terminus is at State Highway 18 near Ralston. The highway runs a total length of 143.8 miles^[1] It has no lettered spur routes.

Route description

Eastern terminus of State Highway 20 at Missouri Route 43

SH-20 begins just north of the Arkansas River at SH-18 near Ralston. From there, it heads east through Osage County for twenty miles (32 km) without crossing any other highway. At mile 20.4, it meets State Highway 99 in Hominy. East of Hominy, SH-20 crosses Lake Skiatook before passing through Skiatook and entering Tulsa County. Shortly after entering Tulsa County, SH-20 has a junction with SH-11. Four miles later, it has an interchange with US-75. After running through Collinsville, it turns southward onto the US-169 freeway.

SH-20 splits from US-169 north of Owasso. It then enters Claremore, where it meets SH-88 and SH-66 (old Route 66). It connects to the Claremore toll plaza on I-44/Will Rogers Turnpike. East of Claremore, SH-20 becomes a divided expressway before intersecting US-69 in Pryor. West of Salina,the highway bridges Lake Hudson. In Salina, SH-20 meets SH-82, which it begins a concurrency with.

Headed north from Salina, the two highways begin to cross some mountainous terrain. The highways provide access to Spavinaw State Park, before running through the town of Spavinaw, Oklahoma. North of Spavinaw, SH-20 splits off to the east, running through unincorporated Chloeta and serving as the eastern terminus of SH-28. SH-20 overlaps US-59/State Highway 10 through Jay. SH-20 then splits off to the east, running 11 miles (18 km) to the Arkansas line.

The easternmost miles run north/south along the Oklahoma–Arkansas state line, and along this stretch the highway overlaps Arkansas's Highway 43. This is the only place where two state highways from different states overlap. The highway continues northward into Missouri at the point where the Oklahoma, Arkansas and Missouri borders meet, and thereafter becomes Missouri Route 43. This unique feature has led many roadgeeks to mention SH-20/AR-43 on their websites.

History

On April 10, 2008, a section of SH-20 in Rogers County near Keetonville, west of Claremore, was closed due to a landside caused by heavy rains.^[2] A 500-foot (150 m) section of roadbed was washed away, forming a large crack in the pavement and damaging the guardrail.^[3] The highway was re-opened June 5, 2008 after being repaired.

Junction list

County	Location	Mile[1]	Destinations	Notes
Osage	Ralston	0.0	SH-18	Western terminus
	Hominy	20.4	SH-99
Tulsa	Skiatook	44.5	SH-11
		48.5	US-75	Diamond interchange
	Collinsville	54.0	US-169	Diamond interchange; SH-20 joins US-169 eastbound and splits westbound
	Owasso	57.1	US-169	Diamond interchange; SH-20 splits US-169 eastbound and joins westbound
Rogers	Claremore	68.9	SH-88
		69.7	SH-66
		69.8	SH-66/88
		71.2	I-44
Mayes	Pryor	86.7	US-69
	Salina	96.8	SH-82	SH-82 joins eastbound and splits westbound
	Spavinaw	111.4	SH-82	SH-82 splits eastbound and joins westbound
Delaware		120.5	SH-28	Eastern terminus of SH-28
	Jay	125.0	US-59/SH-10	US-59/SH-10 join eastbound and split westbound
		127.1	SH-127
		127.3	US-59/SH-10	US-59/SH-10 split eastbound and join westbound
		138.3	Arkansas Highway 43	Arkansas state line, Hwy. 43 joins eastbound and splits westbound
	Southwest City	143.8	Missouri Route 43	Missouri state line; eastern terminus, AR-43 northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi      Concurrency terminus •      Closed/Former •      Incomplete access •      Unopened

References

1. ^ ^{a b} Stuve, Eric. "OK-20". OKHighways. http://www.okhighways.com/ok20.html. Retrieved 2007-09-04. 
2. ^ Oklahoma Department of Transportation. "SH-20 closed at Keetonville Hill until further notice". http://www.odot.org/newsmedia/sh20-keetonville/index.php. Retrieved 2008-04-29. 
3. ^ Oklahoma Department of Transportation. "SH-20 Keetonville Pictures". http://www.odot.org/newsmedia/sh20-keetonville/pictures.htm. Retrieved 2008-04-29. ^{[dead link]}

External links

• SH-20 at OKHighways.com
• SH-20 at Roadklahoma
• OK-20 on Two Wheel Oklahoma