U.S. Route 421 in Indiana

U.S. Route 421 marker
U.S. Route 421
Map
US 421 highlighted in red
Route information
Maintained by INDOT
Length255.065 mi[1] (410.487 km)
Existed1951–present
Major junctions
South end US 421 near Madison
Major intersections US 50 in Versailles
I-74 in Greensburg
I-69 / I-74 / I-465 in Indianapolis
I-70 in Indianapolis
I-69 in Indianapolis
US 24 in Monticello
US 30 in Wanatah
US 6 in Westville
I-80 / I-90 / Indiana Toll Road near Otis
I-94 near Michigan City
North end US 20 in Michigan City
Location
CountryUnited States
StateIndiana
CountiesJefferson, Ripley, Decatur, Rush, Shelby, Marion, Hamilton, Boone, Clinton, Carroll, White, Pulaski, Starke, LaPorte
Highway system
  • Indiana State 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.

  1. ^ "INDOT Roadway Referencing System" (PDF). Indiana Department of Transportation. Archived from the original (PDF) on June 15, 2011.