Final answer:
The term 'Railroad Emergency Notification System (ENS)' is likely a mix-up of two different systems. The Enteric Nervous System (ENS) refers to the complex neural network controlling the gastrointestinal tract.
Step-by-step explanation:
The term 'Railroad Emergency Notification System (ENS)' appears to be a misinterpretation or confusion with two separate systems. The first system is the Enteric Nervous System (ENS), which is the neural tissue associated with the digestive system that is responsible for nervous control through autonomic connections. This system controls functions related to the gastrointestinal tract such as digestion, and it is sometimes referred to as the "second brain" because of its complexity and autonomy.
The second is the emergency notification systems used in various contexts, such as natural disasters or public safety emergencies. In the context of railroads, these systems could include notifications for events like train malfunctions or collisions. They may involve audio signals like alarm-bells or steam-whistles, and visual cues like 'color'd lights' to alert of an approaching train, as mentioned in the poetic reference provided.
However, within the frame of the information provided, it seems that the student might be conflating two distinct concepts since the direct reference to a Railroad Emergency Notification System (ENS) does not match a known system. In the railroad context, corresponding systems would typically be described with different terminology and feature specific technologies for alerting of emergencies.