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Motorists are advised to be alert for construction crews and flaggers along U.S. Highway 31 in Clark County and State Road 9 in Bartholomew County over the next 30 to 45 days while rumble stripes are being cut as part of a $241,200 centerline and edge line project to enhance driver safety.  Localized work begins in mid-April. 

Gridlock Traffic Systems of Indianapolis is the state’s contractor for installing rumble stripes on S.R. 9 from south of Sunland Road to the Shelby County line north of Hope. 

Its crews will also place rumble stripes on U.S. 31 between Memphis and Henryville. 

Rumble stripes alert motorists of potential cross-lane hazards by generating tactile vibrations and audible rumbling or humming sounds. 

They are also known as sleeper lines, corduroy growlers and drift lines.  Studies show these cost-effective applications reduce incidents of cross-lane collisions and off-road crashes.