The 27.15 miles (43.69 km) of SR 156 that lie within Indiana serve as a minor highway.

After leaving Vevay the route enters rural farmland, with some woodlands, as a two-lane highway.

[2][3] No section of State Road 156 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.