Train horns is used as a means of communication between the locomotive operator and the individual train. Furthermore, train horns are used to convey specific instruction from the locomotive to the rest of the train. Since the locomotive is such a large, heavy object that cannot stop quick, the engineer use the horn to communicate with the rest of the train across distances.
Each blast from the horn have a specific meaning, and each meaning is a part of a system that is used to maintain safety for the locomotive crew, the workers on the tracks, and the individual that are near those tracks. The technology of the train horns has changed over time along with the locomotive technology. Steam locomotives used steam whistles, which the steam that powered the locomotives pistins powered.
How Train Horns Work and What Their Blasts Mean
Moddern locomotives use compressed air horns, which are more louder than steam whistles because modern locomotive are larger and faster than steam locomotives. Additionally, some modern locomotives use electronic horns that focus its sound in specific directions so that they are loud for the train engineer but not for individuals that live near the track. The specific patterns of horn blasts on the train are established to communicate with the train.
For instance, a short blast of the horn is used to indicate that the locomotive is to stop, while a long blast of the horn mean that the locomotive is to release its brakes and continue forward. Each of these horn blasts are part of a binary system, or one that include only these two types of blasts. For instance, two long blasts indicate the acknowledgment of a signal passed along to the locomotive, and the train utilizes two long blasts in the same way that a verbal acknowledgement is used.
These long and short blasts are timed for the engineer to ensure that the engineer does not make a mistake in indicating to the locomotive that it should stop versus continue forward. Finally, the specific pattern of horn blasts is regulated to ensure safety at the highway crossings. For instance, when the locomotive is approaching a highway crossing, the engineer is to use a specific rhythm of long and short horn blasts.
Such a horn blast indicates to other drivers and pedestrians that the locomotive is approaching that crossing. Additionally, some communities have established quiet zones, during which the locomotive is to stop using its horn if there are physical barrier to the crossing. These physical barriers keeps the cars from driving onto the tracks of the locomotive.
