Green Means GO

GO

Signal Review:
  
Normal speed is associated with a clear indication, whether it be a lone Green on a high signal, a G/R, or G/R/R.

Move the green down to the middle position, R/G/R, however, and the meaning changes.   Now the indication is "medium clear", and the maximum allowable speed is (usually) around 30MPH.

Bumping the green down to the bottom head, R/R/G, and the indication is now a "slow clear", and limits the trains speed to 15MPH.

GO! Raise straight up and down.

GO OR PROCEED

Held at arm's length above head, when equipment is standing RELEASE AIR BRAKES

GO RELEASE AIR BRAKES
Slight horizontal movement at arm's length at right angle to track REDUCE SPEED

GO REDUCE SPEED

Swung slowly in a circle at right angle to track BACK UP

GO BACK UP

Go Semaphore Signal

Two short whistle blasts indicate the train will start or GO