What does an approach signal look like and what does it indicate?

An approach signal is designed to alert train operators that they need to prepare to stop at the next signal. The appearance of an approach signal typically involves a specific configuration of lights or signs that convey this important message. When a train encounters this signal, it indicates that while it can proceed, the crew must be prepared for a potential stop upon reaching the next signal ahead. This is crucial for maintaining safety and ensuring that the train is always under control, especially as it transitions from high speeds to a stop or slows down significantly in response to the following signal.

Using the approach signal effectively helps prevent accidents and ensures that trains can safely navigate through areas where speed might need to be reduced. Understanding this aspect of signaling is vital for anyone training as a conductor or engineer as it directly relates to operational safety.