New Mexico State Road 421

State Road 421
Route information
Maintained by NMDOT
Length:	8.101 mi[2] (13.037 km)
Existed:	1988[1] – present
Major junctions
West end:	NM 402 near Sedan
East end:	TX 102 at the Texas state line
Location
Counties:	Union
Highway system
State Roads in New Mexico SR • Minor SR • US ← NM 420 NM 423 →

State Road 421, or NM 421, is a state highway in the U.S. state of New Mexico maintained by the New Mexico Department of Transportation (NMDOT). The road, located in southeastern Union County, begins at NM 402 between Amistad and Clayton and passes eastward through the town of Sedan to the Texas state line where the roadway continues as Texas State Highway 102 to U.S. Route 87 near Dalhart, Texas. Before 1988, the road was part of a much longer NM 102.

Route description

The 8.1-mile (13.0 km) two-lane road begins at a t-intersection with NM 402 south of Clayton and west of Sedan in rural Union County. The highway passes through farmland as it travels east before it enters the small town of Sedan, serving as the town's main east-west road. After leaving Sedan, the highway traverses more farmland before terminating at the New Mexico–Texas state line just west of Farm to Market Road 296. The highway continues east into Dallam County, Texas as Texas State Highway 102 until it terminates at U.S. Route 87 northwest of Dalhart.^[3]

History

NM 421 was originally designated as NM 102 between the current NM 402, then part of a northern extension of NM 18, and Sedan in the 1940s.^[4] In the following decade, the road was extended southward along NM 18 then westward through Bueyeros and eastward to the state line meeting up with Texas's Farm to Market Road 808 which was then re-signed continuously as TX 102 in 1955.^[4][5][6] Both NM 421 and NM 402 received their current designations during the 1988 renumbering of the New Mexico highway system.^[1][7]

Major intersections

The entire route is in Union County.

Location	Mile[2]	Destinations	Notes
	0	NM 402 – Amistad, Clayton	Western terminus
	8.101	SH 102 – Dalhart	Eastern terminus, roadway continues as SH 102
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

	U.S. Roads portal
	New Mexico portal

1. ^ ^{a b} Riner, Steve (November 2, 2009). "Details of New Mexico State Routes 401-450". The Unofficial New Mexico Highways Page. http://www.steve-riner.com/nmhighways/NM401-450.htm#421. Retrieved 2010-12-04. ^{[unreliable source]}
2. ^ ^{a b} "State Routes". New Mexico Department of Transportation. p. 21. http://www.nmshtd.state.nm.us/upload/images/CHDB/State%20Routes.pdf. Retrieved December 1, 2010. 
3. ^ Google, Inc. Google Maps – NM 421 (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=d&source=s_d&saddr=NM-102+N%2FNM-421+E&daddr=NM-102+N%2FNM-421+E&hl=en&geocode=FayEJwIdWoLZ-Q%3BFdiFJwIdIrPb-Q&gl=us&mra=dme&mrcr=0&mrsp=0&sz=13&sll=36.14342,-103.158531&sspn=0.04131,0.110378&ie=UTF8&ll=36.138707,-103.115616&spn=0.082625,0.220757&z=12. Retrieved December 1, 2010. 
4. ^ ^{a b} Riner, Steve (May 21, 2009). "Details of New Mexico State Routes 101-125". The Unofficial New Mexico Highways Page. http://www.steve-riner.com/nmhighways/NM101-125.htm#102. Retrieved 2010-12-04. ^{[unreliable source]}
5. ^ Texas Department of Transportation. "Highway Designation File - Farm to Market Road No. 808". http://www.dot.state.tx.us/tpp/hwy/FM0500/FM0808.htm. Retrieved 2010-12-4. 
6. ^ Texas Department of Transportation. "Highway Designation File - State Highway No. 102". http://www.dot.state.tx.us/tpp/hwy/SH/SH0102.htm. Retrieved 2010-12-4. 
7. ^ Riner, Steve (November 2, 2009). "Details of New Mexico State Routes 401-450". The Unofficial New Mexico Highways Page. http://www.steve-riner.com/nmhighways/NM401-450.htm#402. Retrieved 2010-12-04. ^{[unreliable source]}