What is the minimum support requirement for roadway covers?

The correct answer is that roadway covers must be designed to support at least the weight of two vehicles. This requirement ensures that the covers can safely withstand the loads imposed by standard vehicular traffic. The weight of a vehicle can vary, but the design standards take into account typical vehicles that may traverse the cover, including passenger cars and heavier trucks.

By requiring support for two vehicles, the standard provides a safety margin that accounts for potential variations in weight, unforeseen circumstances, and the need for structural integrity under varying load conditions. This precaution helps to prevent accidental failures or collapses that could endanger both the vehicles and individuals using the road.

The other options do not meet the safety and engineering standards necessary for roadway covers. For instance, supporting just one vehicle may not adequately address scenarios where larger or heavier vehicles are present, potentially leading to insufficient strength. Three vehicles might be more than necessary and could lead to unnecessary costs or over-engineering in many situations. Not requiring any minimum support would compromise safety, particularly in infrastructure designed for public use. Therefore, support for at least two vehicles strikes a balance between safety and practicality.