What is a Signal, Fixed?

What is a Signal, Fixed?

• A. A moving signal that follows the train.
• B. A temporary signal for construction.
• C. A warning sign at the end of the line.
• D. A signal of fixed location along the track. It may be a switch indication, speed limit sign, interlocking signal, or any other designated fixed signal.

Answer: (D)

Understanding a fixed signal means recognizing a signal that is positioned in a set spot along the track and provides specific, standard indications to the operator. It stays in one place and can indicate things like how a switch is set (switch indication), a posted speed limit (speed limit sign), or an interlocking signal. This is different from moving signals that travel with or behind the train, temporary construction signals, or warning signs at the end of a line, which aren’t fixed signals in the same sense. So, a signal that is defined by its fixed location on the track and by the types of fixed indications it can display best fits the description.

Understanding a fixed signal means recognizing a signal that is positioned in a set spot along the track and provides specific, standard indications to the operator. It stays in one place and can indicate things like how a switch is set (switch indication), a posted speed limit (speed limit sign), or an interlocking signal. This is different from moving signals that travel with or behind the train, temporary construction signals, or warning signs at the end of a line, which aren’t fixed signals in the same sense. So, a signal that is defined by its fixed location on the track and by the types of fixed indications it can display best fits the description.