U.S. Route 421 in Indiana

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U.S. Route 421 marker

U.S. Route 421
US 421 highlighted in red
Route information
Maintained by INDOT
Length: 255.065 mi[1] (410.487 km)
Existed: 1951 – present
Major junctions
South end: US 421 near Madison
  US 50 in Versailles
I-74 Greensburg
I-74 / I-465 in Indianapolis
I-70 in Indianapolis
I-69 in Indianapolis
I-465 in Indianapolis
US 24 in Monticello
US 30 Wanatah
I-80 / I-90 / Indiana Toll Road near Otis
I-94 near Michigan City
North end: US 20 in Michigan City
Location
Counties: Jefferson, Ripley, Decatur, Shelby, Marion, Boone, Clinton, Carroll, White, Pulaski, Starke, LaPorte
Highway system
SR 364 SR 427

U.S. Route 421 (US 421) enters Indiana from Kentucky, proceeding northwest to Indianapolis, joining Interstate 465, and then continuing northwest to Michigan City.

US 421 winds through the southern part of Indiana as it runs from Madison, in the southeastern part of the state, to Indianapolis (the capital). North of Greensburg, US 421 intersects and merges with I-74 west, through the Shelbyville area en route to Indianapolis. Originally, US 421 followed Michigan Road into Indianapolis, which turns into Southeastern Avenue and heads to downtown. US 421 then merged with US 40 (Washington St.) and headed to West Street, then turned north, following West Street, Northwestern Avenue (later Martin Luther King Jr. Street), and Michigan Road up to the northwest side of the city. US 421 passed an Indianapolis landmark, the Pyramids. North of Indianapolis, US 421 continues to the north-northwest, providing a direct highway link between Indianapolis and Michigan City. US 421 ends at its junction with US 20 on the south side of Michigan City. Originally, the highway's end was a few miles north at the junction with US 12 near the shores of Lake Michigan.

Route description[edit]

Madison to Indianapolis[edit]

US 421 enters Indiana from Kentucky over the Ohio River. After crossing the Ohio River US 421 has a short concurrency with State Road 56 (SR 56). After the concurrency with SR 56 ends US 421 becomes a four-lane highway. US 421 has an intersection with State Road 62 (SR 62). North of Madison US 421 becomes a two-lane highway, heading north then northeast. US 421 heads towards Versailles, passing through an intersection with State Road 250 (SR 250). In Versailles US 421 has a concurrency with State Road 129 that ends at U.S. Route 50 (US 50). US 421 heads west out of Versailles concurrenct with US 50. West of Varsailles US 421 heads northwest, towards Greensburg. US 421 passes through Osgood and Napoleon, passing through intersections with State Road 350 (SR 350) and SR 229. US 421 enters Greensburg on the southeast side of town and heads to the northwest side of town. In Greensburg US 421 is concurrent with State Road 46 (SR 46) and intersects State Road 3 (SR 3). On the northwest side of Greensburg US 421 joins Interstate 74 (I-74). I-74/US 421 heads northwest towards Indianapolis, passing near Shelbyville. Near Shelbyville I-74/US 421 has interchanges with State Road 44 (SR 44) and State Road 9 (SR 9). I-74/US 421 enters Indianapolis on the southeast side of the city. US 421 heads north and west around Indianapolis, concurrenct with Interstate 465.

Indianapolis to Michigan City[edit]

US 421 is concurrent with I-465, until the northwest side of the city. US 421 leaves I-465 heading northwest. US 421 becomes a two-lane highway, heading through intersections with State Road 32 (SR 32), State Road 47 (SR 47), State Road 38 (SR 38), and State Road 29 (SR 29), and has a concurrency with State Road 28 (SR 28). US 421 and SR 28 enter Frankfort heading west; the concurrency ends when US 421 heads north concurrenct with State Road 38 (SR 38) and State Road 39 (SR 39). US 421/SR 38/SR 39 heads northwest out of Frankfort, and 5 miles (8.0 km) later SR 38 heads due west. US 421/SR 39 heads northwest towards Delphi passing through an intersection with State Road 26 (SR 26). In Delphi US 421/SR 39 are concurrenct with State Road 25 (SR 25). US 421/SR 39 heads northwest out of Delphi passing through Pittsburg. West of Pittsburg US 421/SR 39 heads due north towards Monticello. In Monticello the concurrency with SR 39 ends with SR 39 heading east on U.S. Route 24 and US 421 heading west on US 24. US 24/US 421 heads north towards Reynolds, where US 24 heads west and US 421 heads due north. US 421 heads north towards Michigan City, passing through Monon, Wanatah, and Westville. US 421 has intersections with State Road 16 (SR 16), State Road 114 (SR 114), State Road 143 (SR 143), State Road 8 (SR 8), and U.S. Route 30 (US 30). US 421 has concurrency with State Road 14 (SR 14), State Road 10 (SR 10), U.S. Route 6 (US 6), and State Road 2 (SR 2). US 421 has interchanges with Interstate 80/Interstate 90 and Interstate 94. US 421's northern terminus is at U.S. Route 20 (US 20) in Michigan City.

History[edit]

Before US 421 was commissioned in Indiana, the route from Madison to Boyleston was SR 29. This is why SR 129 and State Road 229 (SR 229) have concurrency or terminus at US 421. US 421 from Reynolds to Michigan City was originally State Road 43 (SR 43). This is the reason for SR 143 having its eastern terminus at US 421.

Madison[edit]

US 421 passed through downtown Madison and headed northwest out of Madison. A new route was built east of the old route. The old route was designated State Road 107 until it was decommissioned.

Indianapolis[edit]

US 421 entered Indianapolis on the southeast side of the city and went through downtown. US 421 was routed on Southeastern Avenue, Washington Street, Northwestern Avenue (now Martin Luther King Jr. Street), and Michigan Road.

Michigan City[edit]

US 421 went through Michigan City to U.S. Route 12 (US 12) near Lake Michigan. Then INDOT moved the northern terminus of US 421 south to US 20, on the south side of Michigan City.

Major intersections[edit]

County Location mi[1] km Exit[1] Destinations Notes
Ohio River 0.000 0.000 Milton-Madison Bridge
US 421 south continues into Kentucky
Jefferson Madison 0.532 0.856 SR 56 east – Aurora Eastern end of SR 56 concurrency
0.822 1.323 SR 56 west – Hanover Western end of SR 56 concurrency
4.585 7.379 SR 62 – Hanover, Dillsboro
Belleview 8.144 13.106 SR 250 – Patriot Western terminus of eastern section of SR 250
Ripley Versailles 25.873 41.639 SR 129 south – Vevay Southern end of SR 129 concurrency
26.345 42.398 US 50 east / SR 129 north – Lawrenceburg Eastern end of US 50 concurrency; northern end of SR 129 concurrency
28.475 45.826 US 50 west – North Vernon Western end of US 50 concurrency
Osgood 31.634 50.910 SR 350 east – Delaware Western terminus of SR 350
Napoleon 37.098 59.703 SR 229 – Batesville, Lawrenceburg
Decatur Greensburg 49.725 80.025 SR 46 east Eastern end of SR 46 concurrency
50.127 80.672 SR 46 west – Columbus Western end of SR 46 concurrency
51.121 82.271 SR 3 – North Vernon, Rushville
52.414 84.352 132 I-74 east Eastern end of I-74 concurrency
ShelbyDecatur
Rush county tripoint
LibertyAdams
Orange township tripoint
62.250 100.182 123 St. Paul, Middletown
Shelby Liberty Township 66.695 107.335 119 SR 244
Shelbyville 69.721 112.205 116 SR 44 – Franklin, Rushville
72.432 116.568 113 SR 9 – Shelbyville, Anderson
Fairland 74.862 120.479 109 Fairland Road
Sugar Creek 82.304 132.455 103 London Road
Moral Township 84.237 135.566 101 Pleasant View Road
Marion Acton 86.227 138.769 99 Acton Road
Wanamaker 89.345 143.787 96 Post Road
Indianapolis 90.739 146.030 94
49
I-74 / I-465 west / US 31 west / US 36 west / US 40 west / SR 37 south / SR 67 south
Southeastern Avenue
Western end of I-74 concurrency; southern end of I-465/US 31/US 36/US 40/SR 37/SR 67 concurrency
91.753 147.662 48 Shadeland Avenue Westbound exit and eastbound entrance
93.218 150.020 47 US 52 east / Brookville Road Southern end of US 52 concurrency
94.761 152.503 46 US 40 east / Washington Street Northern end of US 40 concurrency
96.367 155.088 44 I-70 – Indianapolis, Dayton
Lawrence 98.980 159.293 42 US 36 east / SR 67 north / Pendleton Pike – Pendleton Northern end of US 36/SR 67 concurrency
101.195 162.858 40 Shadeland Avenue
56th Street
Indianapolis 103.177 166.047 37 I-69 north / SR 37 north – Fort Wayne
Binford Boulevard – Indianapolis
Southern terminus of I-69; northern end of SR 37 concurrency
105.089 169.124 35 Allisonville Road Formerly SR 37A
107.184 172.496 33 Keystone Parkway
109.706 176.555 31 US 31 north – Westfield, Kokomo
Meridian Street south
Northern end of US 31 concurrency
113.573 182.778 27 I-465 west / US 52 west
Michigan Road
Northern end of I-465/US 52 concurrency
Boone Rosston 122.512 197.164 SR 32 – Lebanon, Noblesville
Marion Township 128.932 207.496 SR 47
Clinton Kirklin 133.744 215.240 SR 38
Michigan Township 139.491 224.489 SR 28 east – Tipton Eastern end of SR 28 concurrency
139.996 225.302 SR 29 north – Logansport Southern terminus of SR 29
Frankfort 146.173 235.243 SR 28 west / SR 38 south / SR 39 south Western end of SR 28 concurrency; southern end of SR 38/SR 39 concurrency
147.035 236.630 SR 75 north Southern terminus of SR 75
WashingtonRoss
township line
151.992 244.607 SR 38 west Northern end of SR 38 concurrency
Rossville 157.248 253.066 SR 26
Carroll Deer Creek Township 166.090 267.296 SR 18 east Eastern end of SR 18 concurrency
Delphi 168.671 271.450 SR 25 – Logansport, Lafayette
Tippecanoe Township 173.664 279.485 SR 18 west Western end of SR 18 concurrency
White Monticello 184.697 297.241 US 24 east / SR 39 north Eastern end of US 24 concurrency; northern end of SR 39 concurrency
Reynolds 190.611 306.759 US 24 west / SR 43 south Western end of US 24 concurrency; northern terminus of SR 43
Monon 198.825 319.978 SR 16
Pulaski Salem Township 203.631 327.712 SR 114 west Eastern terminus of SR 114
White Post Township 209.680 337.447 SR 14 west Southern end of SR 14 concurrency
212.050 341.261 SR 14 east Northern end of SR 14 concurrency
Cass Township 217.553 350.118 SR 143 west Eastern terminus of SR 143
Starke San Pierre 221.013 355.686 SR 10 west – DeMotte Southern end of SR 10 concurrency.
223.032 358.935 SR 10 east – Culver, Argos Northern end of SR 10 concurrency
LaPorte LaCrosse 230.077 370.273 SR 8 – Hebron, Knox
Wanatah 238.124 383.223 US 30 / Lincoln Highway – Merrillville, Valparaiso, Plymouth, Fort Wayne
Westville 243.954 392.606 US 6 east – Walkerton Southern end of US 6 concurrency
245.086 394.428 US 6 west – Hobart Northern end of US 6 concurrency
245.814 395.599 SR 2 south – Valparaiso Southern end of SR 2 concurrency
246.943 397.416 SR 2 north – Laporte Northern end of SR 2 terminus
New Durham Township 248.847 400.480 I-80 / I-90 / Indiana Toll Road – South Bend, Gary, Chicago
Coolspring Township 253.235 407.542 I-94 – Michigan City, Gary, Chicago, Detroit
Michigan City 255.065 410.487 US 20 – Michigan City, South Bend, Gary Northern terminus of US 421
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also[edit]

References[edit]

  1. ^ a b c "INDOT Roadway Referencing System" (PDF). Indiana Department of Transportation. 

External links[edit]

Route map: Google

KML is from Wikidata


U.S. Route 421
Previous state:
Kentucky
Indiana Next state:
Terminus