What is the role of warning devices at a crash scene?

The role of warning devices at a crash scene is primarily to alert motorists and ensure safety. These devices, such as flares, cones, or signs, are critical in communicating to approaching drivers that there is a hazardous situation ahead. This alertness helps drivers to reduce speed and take necessary precautions to avoid further accidents or injuries.

By effectively warning motorists about the presence of a crash and potentially obstructed roadways, these devices play a vital role in protecting not only the individuals involved in the crash but also rescuers and passing vehicles. The use of warning devices enhances overall safety in an unpredictable environment that could easily lead to secondary accidents if not properly marked and managed.

The other options do not accurately reflect the primary purpose of warning devices. They do not serve as decorative elements or assist police in directing individuals to hospitals, nor are they intended to gather evidence. Their central function is firmly rooted in promoting awareness and safety at the scene of a crash.