Running for 10.865 miles (17.486 km) in a general east–west direction, connecting Frankton and rural Madison County.

The highway passes through mostly agricultural and residential properties, as a two-lane roadway.

[2][3] No segment of State Road 128 in Indiana is included in the National Highway System (NHS).

[4] The NHS is a network of highways that are identified as being most important for the economy, mobility and defense of the nation.

This measurement is a calculation of the traffic level along a segment of roadway for any average day of the year.