Ever since time immemorial, train horns have had various uses. Although many of them are fitted on trains, they way are formed and placed also differs in many ways. While their placement on trains may be uniform for the different types of trains on which they feature, they still manage to send out different signals depending on how they are blown. Similarly, the length for which they are blown always has a different effect upon those concerned.
The most common function that train horns play is to alert the public of impending train arrivals. This may be interpreted in different ways. To those who are waiting to board the train to their next destination, it could be a signal that the train is almost there. This could be an important reminder especially for those passengers who may be engrossed in their own thoughts or other activities.
Those who could have wandered off within the precincts of the rail station could also be saved the inconvenience of missing their train. This can be a real boost for parents who are traveling with their children. Parents can tell their children to listen out for the sound of train horns as sign that play time is over.
Train horns can also be blown to indicate the need for members of the public to stay away from rail tracks. This is normally the casein heavily populated areas where lay about make it a habit to idle around rail roads. It is an important that rail companies use to avert accidents on that rail tracks. Normally the horn will be blown while that train is a considerable distance away from any one who could be playing on the track.
Train horns could also be blown for other reasons apart from clearing the rail tracks.
It is standard practice for trains to have their horns blown while approaching intersections. This could a signal to other trains top clear the tracks quickly. If there were any members of the public or other vehicles they could also take the earliest opportunity to run to safety. Other significant areas from where one may hear such horns include yards, multiple railroads or tunnels. They can also sound out to warn any working on the tracks.
Train horns can also serve as a symbol of communication among different trains. They could be used to indicate whether or not any signal send out by another train has been received by the intended recipient. Furthermore, a train may use the horn to pass a message that has not been provided for by any of the existing signals. This could happen if the horn is blown in a manner that is different from any scheme provided for in the train horn manual. All the different functions are achieved using different ways in which the horn is blown.