Rules for operating on the Time Interval System
At any time the track is obstructed within an area controlled by a signal, that signal must be placed at danger. If the obstruction occurs in a place not protected by a signal a man must be sent one mile up the line to warn approaching trains.
10 minutes before any train is scheduled to arrive all obstructions must be removed and all vehicles must be locked behind scotch blocks clear of the line.
As soon as a train arrives the signal must be placed at danger.
For 5 minutes after a Passenger train leaves the station the signal must be kept at danger.
For 8 minutes after a Goods train leaves the station the signal must be kept at danger.
For 5 to 10 minutes after a passenger train leaves the station the signal must be at caution.
For 8 to 15 minutes after a goods train leaves the station the signal must be at caution.
A stopped train may follow a train which passed without stopping 5 minutes after the passing train has vanished from sight.
In foggy weather a man must be sent one mile up the line placing detonators at 300 yard intervals and two at the one mile point to indicate danger.
When one train is scheduled to pass another:
An Ordinary Passenger train must wait on an Express until it is 15 minutes late.
A Third
Class Passenger train must wait on an Express or Ordinary Passenger train until
it is 20 minutes late.
A Goods train must wait on any Passenger train until it is 30 minutes Late.
After dark or in foggy weather a passenger train may not follow a goods train until 15 minutes have passed. Even then the Policeman (Signalman) must tell the driver what sort of train he is following until a train operating at minimum speed may be assumed to have passed the next signal.