It would be very dangerous if there were no traffic signals on railways. One train could crash into another head-on. Railway traffic signals are also needed because one train could crash into the back of the train in front. When there are traffic signals, we needn't worry. They tell us to stop for danger, or to go slow, or when it's safe to go fast. Just as towns and cities have their traffic signals for automobiles, the railroads have signals, and they are classified according to their use:
1. Traffic signals. These are essentially the same as the signals that are used on roads. They tell the train engineer to "Go," "Stop," "Be careful" or "Slow down."
2. Signs. These are used between workers in places where it is too noisy to hear voice signals, such as in marshalling yards. There are signs that are given by hand meaning "Go forwards," "Go backwards" or "Slow."
3. Signposts. These are posted along the railroad tracks to inform the train engineer of the condition of the roadbed or the degree of a curve or slope, or to warn him of a crossing where he must blow his whistle. Railroad signals vary from country to country.
1. Traffic signals. These are essentially the same as the signals that are used on roads. They tell the train engineer to "Go," "Stop," "Be careful" or "Slow down."
2. Signs. These are used between workers in places where it is too noisy to hear voice signals, such as in marshalling yards. There are signs that are given by hand meaning "Go forwards," "Go backwards" or "Slow."
3. Signposts. These are posted along the railroad tracks to inform the train engineer of the condition of the roadbed or the degree of a curve or slope, or to warn him of a crossing where he must blow his whistle. Railroad signals vary from country to country.
0 comments:
Post a Comment