Missouri Route 171

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Route 171

MO 171 highlighted in red
Route information
Maintained by MoDOT
Length25.931 mi[1] (41.732 km)
Major junctions
South end I-49 / US 71 / Route 96 / Route 571 in Carthage
North end K-171 near Opolis, KS
CountryUnited States
Highway system
I-170 Route 172

Route 171 is a short highway in southwestern Missouri. Its northern terminus is at the Kansas state line where it continues as K-171 near Opolis, Kansas. Its southern terminus is at the junction of Interstate 49/U.S. Route 71, Route 96 and Route 571 in Carthage. The last ten southbound miles are concurrent with Business I-49.

Route description

Some (about half) of those last 10 miles (16 km) to Carthage, from its junction with I-49 Business at Madison Ave. in Webb City, are routed in a northeasterly direction. This results in going northeast on southbound Route 171 and vice versa along this stretch. However, I-49 Business is going more or less in its designated direction, north, in a wrong-way concurrency at the same time.

Also, because of this curve back to the northeast, Route 171 and Route 96 intersect each other on opposite sides of the Joplin/Webb City area. Going "southbound," Route 96 and Route 171 meet each other about two miles (3 km) north of Carl Junction and then again about two miles (3 km) west of Carthage. Route 96 maintains a straight east–west routing between these two points except at the very east end before the intersection with Route 171 and I-49 Business.

At Carthage, Route 171 meets its "parent" route, US 71, along with I-49. Route 171's "southern" terminus and I-49 Business' northern terminus are here while the northern terminus of Route 571 approaches from the east. Route 96 continues through this interchange. This results in three x71's meeting in the same location.


Route 171 was once Route 57. That was changed when I-57 was established on the eastern side of the state. Kansas did not change K-57's number to match until 2004, when it became K-171 after it was decided to shorten K-57 because it had numerous concurrencies along its routing.

Major intersections

The entire route is in Jasper County.


I-49 / US 71 / Route 96 east / Route 571 south – Carthage, Kansas City, Joplin
I-49 exit 53; southern end of I-49 Bus. / Route 96 overlap; southern end of freeway
Route 96 west / Oak Street – Oronogo
Northern end of Route 96 overlap
3.5345.68746 Historic US 66/Brooklyn Heights
Carterville6.1959.97044 Route HH – Carterville

Route 249 south to I-44 / I-49 – Joplin
Interchange; northern end of freeway
Webb City8.81014.178
I-49 BL south (Madison Avenue) – Joplin, Missouri Southern State University
Northern end of I-49 Bus. overlap
Historic US 66 east (Powell Drive)
Southern end of Historic US 66 overlap
Airport Drive10.80817.394
Route 43 / Historic US 66 west (North Main Street Road) – Joplin, Joplin Regional Airport Main Terminal
Roundabout; northern end of Historic US 66 overlap

Route 96 east / Route YY west – Kansas state line, Carthage
K-171 west – Pittsburg
Continuation into Kansas
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b Missouri Department of Transportation (December 13, 2020). MoDOT HPMAPS (Map). Missouri Department of Transportation. Retrieved December 13, 2020.