During what scenarios is it acceptable for a ground vehicle to operate without a guide?

Ground vehicles operating within the jurisdiction of the Chicago Department of Aviation are required to have a guide at all times for safety and operational efficiency. The necessity for a guide is rooted in ensuring that vehicles can navigate complex environments like airports effectively, minimizing risks to both personnel and infrastructure.

Operating without a guide could lead to potential miscommunication, dangerous situations, or accidents, especially in busy areas with passengers, crew, and other vehicles present. Even under seemingly benign conditions, such as when no other vehicles are around or when using specific types of equipment like small bag tractors, the potential for unexpected situations or obstacles makes the presence of a guide essential. Therefore, there are no scenarios that permit operation without a guide, making the choice that states "No scenarios allow this" the correct one.