Route Description
Only one segment of U.S. Route 12 is included in the National Highway System (NHS). That is the segment that is concurrent with U.S. Route 20 from the Illinois state line to the split with US 20 in East Chicago. The NHS is a network of highways that are identified as being most important for the economy, mobility and defense of the nation. The highway is maintained by the Indiana Department of Transportation (INDOT) like all other U.S. Highways 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 the lowest traffic levels were 3,120 vehicles and 350 commercial vehicles used the highway daily near Ogden Dunes. The peak traffic volumes were 30,510 vehicles and 2,430 commercial vehicles AADT along the section of US 12 at the Illinois state line, concurrent with US 20 and US 41. The highway has been designated as the Iron Brigade Memorial Highway to honor the Civil War Union Army unit; it has the same designation in Michigan, Wisconsin and Illinois.
Read more about this topic: U.S. Route 12 In Indiana
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