What does a Dwarf Signal displaying red over red indicate?

When a Dwarf Signal displays red over red, it indicates a fixed STOP condition. This signal is a clear directive to the operator that they must stop the train and cannot proceed past the signal. The use of two red lights reinforces the importance of this stop indication, ensuring that it is unmistakable for the train's operator.

Dwarf Signals are typically utilized in locations with low speed or where visibility is limited, such as at yard switching areas or sidings. The red over red configuration serves as a crucial safety measure, signaling that the track ahead may be obstructed, or that there may be other conditions present that require the train to halt. By adhering to this directive, operators ensure safe train operations and compliance with signaling rules.