Final answer:
When encountering an oversized vehicle with a 'Wide Load' sign, provide extra space and avoid sudden moves. An empty trailer will likely bounce more than a heavy one, indicating the need for caution due to unpredictable movements.
Step-by-step explanation:
If you approach an oversized vehicle marked with a "Wide Load" sign, the safest course of action is to give extra space and avoid sudden movements. Passing quickly or maintaining your current position can be dangerous due to the size and potential maneuverability constraints of the oversized vehicle. Driving closely behind it to improve visibility is also not advised, as it limits your reaction time if the vehicle suddenly brakes or changes course.
When you notice that a trailer on a highway is bouncing up and down slowly, it is more likely that the trailer is nearly empty. A heavily loaded trailer would generally have less suspension movement due to the weight stabilizing the load. Understanding whether a trailer is heavily loaded or nearly empty is important for safety reasons, as an empty trailer can behave unpredictably on the road, potentially causing accidents.