Which statement is true regarding overhead clearance?

The statement that a vehicle's weight affects its height is not accurate in the context of overhead clearance. Vehicle height is determined by its physical dimensions, including the height of the body, trailer, or any load it may be carrying, rather than its weight. Overhead clearance is primarily a concern when determining whether a vehicle can safely pass under obstacles such as bridges, overpasses, or power lines.

While it is true that other aspects may play a role in overhead clearance, such as load distribution and equipment on top of the vehicle (like air conditioning units), the weight itself does not directly impact the height of the vehicle. Therefore, the correct understanding is that the height of the vehicle remains constant regardless of the load weight, provided that no dynamic parts of the vehicle change during motion (like air suspension systems).

Contextually, understanding how overhead clearance works is vital for safe driving, especially for commercial vehicle operators, since failing to recognize the proper clearance can lead to accidents or vehicle damage.