Which type of ground motor vehicles are not permitted to drive under terminal buildings?

The choice indicating that ground motor vehicles transporting flammable material are not permitted to drive under terminal buildings is correct because of safety regulations and risk management practices. Areas underneath terminal buildings are typically designated as secure zones where stringent safety standards must be observed to prevent accidents and mitigate hazards, particularly those related to fire and explosive risks.

Flammable materials pose a significant risk. Allowing vehicles transporting such materials under terminal buildings could lead to severe incidents in the event of a leak, spill, or fire, potentially endangering passengers, staff, and the facility itself. Therefore, regulations are in place to ensure that only certain types of vehicles, which do not introduce similar risks, are allowed in these sensitive areas.

In contrast, while other types of vehicles may be restricted under certain guidelines, electric ground motor vehicles and fossil fuel-powered vehicles can be permitted with proper safety mechanisms and protocols in place, provided they do not pose an immediate danger that flammable materials inherently do. This distinction highlights the specific concern for safety in terminal building environments, which is prioritized through such regulations.