Indiana State Road 312

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State Road 312 marker

State Road 312
Route information
Maintained by INDOT
Length: 5.11 mi[1] (8.22 km)
Major junctions
West end: South Brainard Avenue & South State Line Road at the Illinois state line
East end: US 12 / SR 912 in East Chicago
Counties: Lake
Highway system
SR 311 SR 327

State Road 312 in the U.S. state of Indiana is an east–west state highway in the northwestern part of the state.

Route description[edit]

SR 312 heads east from the Illinois state line, as a two-lane highway passing through residential properties. This section is concurrent with Gostlin Street in Hammond. The route turns due south onto Sheffield Avenue and has an at-grade crossing with four sets of Norfolk Southern railroad tracks. After the tracks the highway turns due onto Chicago Avenue and passes through residential properties as a two-lane urban roadway. At Calumet Avenue the roadway becomes a four-lane undivided highway passing through a mix of commercial and residential properties. The route passes under the Indiana Toll Road and enters a mostly commercial area, having an intersection with U.S. Route 20 (US 20). The highway crosses over the Indiana Ship Canal and passes between industrial properties. SR 312 eastern terminus is at an interchange with US 12 and SR 912. Chicago Avenue heads east of US 12 and SR 912 as a city street. The street passes through more industrial properties and ends at Industrial Highway, formerly US 12.[2][3][4]

No part of SR 312 is included as a part of the National Highway System (NHS).[5] The NHS is a network of highways that are identified as being most important for the economy, mobility and defense of the nation.[6] The highway is maintained by the Indiana Department of Transportation (INDOT) like all other state roads in the state. The department tracks the traffic volumes along all state highways as a part of its maintenance responsibilities using a metric called average annual daily traffic (AADT). This measurement is a calculation of the traffic level along a segment of roadway for any average day of the year. In 2010, INDOT figured that lowest traffic levels were the 5,400 vehicles and 260 commercial vehicles used the highway daily on a section that is concurrent with Sheffield Avenue. The peak traffic volumes were 15,310 vehicles and 1,090 commercial vehicles AADT along a section of SR 312 between the Indiana Toll Road and US 20.[7]

Major intersections[edit]

The entire route is in Lake County.

Location mi[1] km Destinations Notes
Hammond 0.00 0.00 South Brainard Avenue Western terminus of SR 312
1.12 1.80 US 41 (Calumet Avenue) – St. John, Whiting
2.57 4.14 US 20 (Indianapolis Boulevard) – Whiting, Gary
East Chicago 5.11 8.22 US 12 (Cline Avenue) / SR 912 – East Chicago, Highland Eastern terminus of SR 312
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b Staff (2004). "Reference Post Book" (PDF). Indianapolis: Indiana Department of Transportation. S-312. Retrieved March 27, 2012. 
  2. ^ Google (December 18, 2012). "Indiana State Road 312" (Map). Google Maps. Google. Retrieved December 18, 2012. 
  3. ^ Indiana Department of Transportation (2012). Indiana Transportation Map (PDF) (Map) (2011–12 ed.). Indianapolis: Indiana Department of Transportation. Retrieved December 18, 2012. 
  4. ^ Indiana Department of Transportation (2011). Indiana Railroad Map (PDF) (Map). Indianapolis: Indiana Department of Transportation. Retrieved December 18, 2012. 
  5. ^ Federal Highway Administration (December 2003). National Highway System: Indiana (PDF) (Map). Washington, DC: Federal Highway Administration. Retrieved December 18, 2012. 
  6. ^ Natzke, Stefan; Neathery, Mike; Adderly, Kevin (September 26, 2012). "What is the National Highway System?". National Highway System. Federal Highway Administration. Retrieved December 18, 2012. 
  7. ^ Staff (2010). "Indiana Traffic Counts". Indianapolis: Indiana Department of Transportation. Retrieved September 15, 2012. 

External links[edit]

Route map: Bing / Google