Indiana Code Title 9. Motor Vehicles § 9-21-8-41

Sec. 41. (a) A person who drives a vehicle may not disobey the instructions of an official traffic control device placed in accordance with this article unless otherwise directed by a police officer.

(b) When a traffic control device or flagman is utilized at a worksite on a highway for traffic control, a person who drives a vehicle shall exercise extraordinary care to secure the mutual safety of all persons and vehicles at the worksite.

(c) All traffic shall observe and obey traffic control devices including signals, signs, and warnings, and all directions, signs, or warning devices that may be given or displayed by a police officer or flagman to safely control traffic movement at a worksite and promote safety at a worksite.