What is the maximum distance at which you must display a warning device when obstructed by a hilltop?

In Indiana, when your vehicle is obstructed by a hilltop and you need to alert other drivers about your presence, the law requires that you display a warning device at a maximum distance of 500 feet behind the obstruction. This requirement is intended to ensure the safety of both the driver and others on the road by providing ample warning to approaching vehicles, giving them enough time to react safely. Properly placed warning devices can help prevent accidents by making it clear that there may be something blocking the road ahead, such as a stopped vehicle or debris. Being visible from 500 feet away provides a significant safety buffer, allowing other drivers to slow down or change lanes in advance.