Which safety feature is essential for heavy trailers?

Adequate reflective markers and lights are crucial safety features for heavy trailers because they significantly enhance visibility, especially during low-light conditions or inclement weather. These markers and lights ensure that other drivers can easily see the trailer from a distance, reducing the likelihood of accidents. Properly placed reflective markers and functioning lights help convey the dimensions and position of the trailer, which is particularly important for large vehicles that may not be as easily seen as smaller ones.

In contrast, while a power steering system can aid in maneuverability and comfort, it does not directly relate to visibility and safety in the same manner. Low rolling resistance tires contribute to fuel efficiency and can improve handling but do not enhance safety as directly as reflective markers and lights. An automatic transmission can make operation easier but does not impact safety features associated with visibility and awareness on the road. Thus, the requirement for adequate reflective markers and lights stands out as essential for ensuring the safety of heavy trailers.