The operation of many trains over the railroad at the same time
makes it mandatory to have Operating Rules. One very important part
of the Operating Rules is the section on Fixed Signals. Signals
are a means of communicating instructions to train engine crews.
The signal system used on the P&LE Railroad is the COLOR
LIGHT SIGNAL SYSTEM. The three colors used are RED,
GREEN and YELLOW. The names ordinarily
associated with the colors are STOP with RED,
CLEAR with GREEN and APPROACH
ONE LIGHT, TWO
LIGHTS, or THREE
LIGHTS may be used on a signal to convey instructions.
In addition to STOP, CLEAR and
APPROACH instructions, SPEED instructions
are also conveyed by the signal. The most involved instruction
that must be given at a particular location determines whether a
one, two or three light signal is used.
The name of a signal is read from the top position down.
When Red is used with
Green or Yellow, Red
is not considered because it contributes
nothing to the name of the signal. It remains
lighted to let you know it is in working order and to show the relationship
of the other lights - whether in top, middle or bottom positions.