What is the definition of an over-height vehicle?

An over-height vehicle is defined as a vehicle that exceeds a specific height limit, which in this context is set at 2.0 meters (6.5 feet). This definition is crucial in airport operations, as vehicles that are taller than this measurement may pose risks, such as interference with hangars, overhead structures, and other airside operations. Understanding the classification of vehicles based on height helps ensure safe movement and operational efficiency in the aviation environment.

The other choices do not accurately define what constitutes an over-height vehicle. For example, defining a vehicle used exclusively for towing aircraft does not provide any information regarding its height. Special safety features relate to vehicle design and safety protocols rather than height specifications, and emergency-only vehicles pertain to their use case rather than their physical characteristics. Thus, only the height specification aligns with the definition provided in this question.