What Do Railroad Signal Lights Mean?

Save

Engineering a train is a complicated job that requires extensive preparation. Unlike roads, trains going in either direction need to share a piece of track. To keep everyone safe, railroad traffic lights help to lead the way.

Reasons

If trains are all on time and running perfectly, then there would be no need for signal lights. Unfortunately, problems happen, and the signal lights warn the engineer of potential dangers.

Tracks

The signal lights will also show the engineer which track he should be on, especially when entering or leaving a station.

Types of Signals

There are two types of signals that are used by the railroads: permissive and absolute. Permissive signals give the engineer a choice on whether or not to go, but absolute signals need to be followed no matter what.

Semaphore

A semaphore resembles a small tower with lights in pairs on it. The lights that signal the engineer are on the semaphore.

Single Colors

If one light is covered and the other is green, it means that the track is clear and to go. A red light, which is absolute, means to stop.

Mixed Colors

Sometimes both lights show. Green over red instructs the engineer to slow down and be ready to stop at the next signal. Red over green also warns to be ready to stop, but the train will be able to go after stopping.

Related Searches

References

Promoted By Zergnet

Comments

You May Also Like

Related Searches

Check It Out

How to Travel For Free With Reward Points

M
Is DIY in your DNA? Become part of our maker community.
Submit Your Work!