Why is it important for a driver to know the height of their vehicle and load?

Understanding the height of a vehicle and its load is crucial primarily to ensure that the vehicle does not exceed posted overhead clearance limits. Many roadways, bridges, and underpasses have specific height restrictions, and exceeding these can lead to dangerous situations such as collisions with overhead structures. If a driver unknowingly attempts to pass under a bridge or structure that cannot accommodate their vehicle's height, it can result in significant damage, accidents, or even halt traffic. This knowledge not only helps in maintaining safety on the road but also prevents costly damages and liabilities.

The other options, while relevant to driving in general, do not directly address the primary concern related to vehicle height and clearance. For instance, while fuel consumption may be affected by different factors, height isn’t a direct cause of increased consumption. Avoiding penalties might be an outcome of compliant driving practices but doesn’t specifically relate to vehicle height. Passenger comfort is also important but is not directly impacted by height awareness.