(1) Succession of short sounds
Use when persons or livestock are on the track at other than road crossings at grade. In addition, use to warn railroad employees when an emergency exists, such as a derailment. When crews on other trains hear this signal, they must stop until it is safe
(4) o o
Acknowledgment of any signal not otherwise provided for.
(7) � � o �
When approaching public crossings at grade with the engine in front.
(8) � o
Approaching men or equipment or other individuals on or near the
After sounding initial warning for men or equipment or other individuals,
sound whistle signal (4) intermittently until the head end of train has
passed the men or equipment or other