How are trains typically identified according to the Engine Identifying Number Rule?

Trains are typically identified by their initials and engine number as outlined in the Engine Identifying Number Rule. This system provides a clear and standardized method for identifying individual trains. The initials refer to the railroad company operating the train, while the engine number gives a specific identifier for that locomotive within the company's fleet. This ensures that crew members and dispatchers can effectively communicate and track trains across various locations and services.

Other methods, such as identifying trains by color schemes or weight, do not provide the same level of precision and would make it more difficult to manage train operations effectively. Similarly, identifying trains solely by their assigned routes would not be practical, as trains may change routes or assignments. Hence, using initials and engine numbers remains the most reliable means of identification in the railroad industry.