When going between cars or locomotives, what is required before starting work?

Before starting work between cars or locomotives, it is essential that all crew members understand the work being performed. This requirement is critical for ensuring safety and coordination among team members. When everyone is aware of the tasks at hand, they can anticipate each other's actions, follow safety protocols, and respond appropriately to any potential hazards or emergencies.

Safety in rail operations relies on teamwork and communication, and a thorough understanding of the work helps to prevent accidents and misunderstandings that could lead to serious injuries or damage. Ensuring that all crew members are on the same page fosters an environment where safety is prioritized, and everyone can contribute to a smooth operation. In contrast, other options do not address the collaborative aspect of crew work essential for safe operations.