U.S. Route 166

U.S. Route 166
Route information
Auxiliary route of US 66
Length:	166 mi (267 km)
Existed:	1926 – present
Major junctions
West end:	US-81 in South Haven, KS
East end:	I-44 / US 400 near Joplin, MO
Highway system
United States Numbered Highways List • Bannered • Divided • Replaced

U.S. Route 166 is an 166-mile (267 km) east–west United States highway. This route and US-266 are the only two remaining spurs of historic U.S. Highway 66, since US-666 was renumbered in 2003.

US-166 meets the old route of US-66, now designated Alt US-69, in Baxter Springs in the southeast corner of Kansas.

Route description

Lengths
	mi	km
KS	163.223[1]	262.682
MO	0.6[2]	1.0

US-166's western terminus in South Haven, Kansas

U.S. 166's eastern terminus approaching I-44 in Newton County, Missouri

As of 2006, the highway's western terminus is in South Haven, Kansas at an intersection with US-81, approximately 1-mile (1.6 km) north of the northern terminus of U.S. Highway 177. From this point, it heads east for about four miles (6 km), where it intersects the Kansas Turnpike (Interstate 35) at exit 4. It then enters Arkansas City, where it meets US-77 and overlaps it for approximately two miles, splitting off near Parkerfield.

US-166 crosses into Chautauqua County shortly before passing through Cedar Vale. It runs south of Sedan, intersecting K-99. Near Havana, US-166 has an interchange with US-75, where the two routes begin a concurrency. US-166 splits off just north of Caney. It has a brief concurrency with US-169 in the Coffeyville area. It also overlaps US-59 through Chetopa before crossing U.S. Route 69 north of Treece. In Baxter Springs, it crosses US-69 Alternate before joining with US-400 west of town. Just before crossing into Missouri, it serves as the southern terminus of K-26.

U.S. 166's eastern terminus is southwest of Joplin, Missouri at an intersection with Interstate 44 0.6 miles (0.97 km) from the Kansas border.^[2] It is also about 1000 feet (300 m) from the point where Kansas, Missouri, and Oklahoma meet. U.S. Route 400 also ends here, and the routes are co-signed from this point to near Baxter Springs, Kansas, a distance of approximately 10 miles (16 km).

History

US 166 is an original 1926 route and originally ran from Baxter Springs, Kansas to South Haven. In 1945, it was extended east through Joplin, Missouri, where it paralleled U.S. Route 66 to Springfield, Missouri. This extension absorbed Route 38,^[vague] which had been formed in 1922 from Carthage to west of Springfield and realigned to Joplin in about 1930, with the former route becoming Route 38N and soon U.S. Route 71 Alternate. In 1966, following the completion of the last section of Interstate 44 in Missouri, the east end of US 166 was truncated back from Springfield to its current terminus. Most sections of US 166 between Joplin and Springfield were not upgraded to Interstate Highway standards and were renumbered as I-44 Business Loops, state highways (such as Route 174) or turned over to local or county jurisdiction.

Bannered routes

Business loops and spurs

• U.S. Route 166 Business – Sedan, Kansas
• Springfield, Missouri – Decommissioned

Junction list

County	Location	Mile[1][2]	Destinations	Notes
Sumner	South Haven	0.000	US-81	Western terminus
		3.481	I-35 / KTA	Parclo interchange
Cowley	Arkansas City	20.540	US-77
		22.993	US-77
		40.883	K-15
		44.833	K-15
Chautauqua		66.984	US-166 Bus.	Western terminus of US 166 BUS
		71.325	US-166 Bus. / K-99	Eastern terminus of US 166 BUS
Montgomery		85.579	US-75	Trumpet interchange
		88.577	US-75
	Coffeyville	106.083	US-169
		108.104	US-169
Labette		120.743	K-101	Southern terminus of K-101
		128.927	K-134	Southern terminus of K-134
	Chetopa	135.054	US-59
		136.548	US-59
Cherokee		150.694	US-69
	Baxter Springs	156.181	US-69 Alt.
		158.017	US-400
		161.322	K-26	Southern terminus of K-26
Missouri state line
Newton		0.6	I-44	I-44 exit 1; eastern terminus of US 166, eastern terminus of US 400
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

1. ^ ^{a b} Kansas Department of Transportation. "Pavement Management Information System". http://www.ksdot.org:9080/matreslab/pmis/query.asp. Retrieved 2008-09-26. 
2. ^ ^{a b c} Google, Inc. Google Maps – U.S. Route 166 (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=d&saddr=KS-166%2FUS-400&daddr=US-166%2FUS-400&hl=en&geocode=FQqmNAIdjj5c-g%3BFQqMNAIdxFRc-g&mra=ls&sll=37.023113,-94.733402&sspn=0.002514,0.005686&ie=UTF8&z=16. Retrieved 2008-09-16. 

• Endpoints of US highways

Browse numbered routes
← K-163	KS	K-167 →
← Route 165	MO	Route 168 →