Single And Bi Directional Lines Flashcards
Define a single line.
Same as bi-directional except there is only one line.
Define bi-directional line.
A line signalled in both directions with no priority over direction. Used in multi track layout.
What is the overall principle of a single line?
One train at any one time is allowed on a single line section
Two main risks of a single line.
Head on collision and rear end collision.
How can a train staff be identified?
Block of wood with a key on the end. There is a line identification plate on it.
What authorities are needed to enter a one train working with staff line?
The staff and the signal.
Where is the staff kept?
The leading cab.
4 circumstances staff is not needed.
Travelling through a possession. Modified working arrangements. Assist a failed train. Pilotman working.
What authority is needed to enter a one train working line with no staff?
Signal.
Main risk of one train working with no staff.
Collision due to SPAD of entrance signal.
What two ways can identify the correct token?
Section of line is written on token. Token is colour coded.
What authority is needed to enter a token single line?
Token and signal.
Where should the token be kept?
The leading cab.
If there is more than one locomotive what must you do.
Both drivers must see the token. It must be kept in the leading cab.
With electric token line when is token not needed?
Travelling through a possession. Modified working arrangements. Pilotman working. Assisting a failed train. Passing section signal to shunt.
