What is the meaning of a white traffic sign?

Answer: C — Regulatory Sign

A white traffic sign in Indiana typically indicates a regulatory sign. Regulatory signs provide instructions or give information about rules that road users must follow. These signs are crucial for maintaining order and safety on the road by providing clear guidance to drivers. In this case, speed limit signs, warning signs, and yield to pedestrian signs are typically represented by different colors and shapes, not white, making option C the correct choice.