Final Answer:
One person permitted to ride in the operating cab with the train operator is the authorized personnel responsible for train operations or maintenance.
Step-by-step explanation:
The operating cab of a train is a restricted area, and access is typically limited to authorized personnel involved in train operations or maintenance. This can include individuals such as train operators, conductors, or maintenance personnel who are responsible for the safe and efficient operation of the train. The specific regulations and policies regarding who is allowed to ride in the operating cab may vary based on the jurisdiction, type of train, and organizational policies.
Allowing only authorized personnel in the operating cab helps ensure the safety and security of the train operation. It also facilitates effective communication and coordination between the train operator and other personnel involved in the operation or maintenance of the train.