Definitions

Question 1

Absolute Block Section

Answer 1

the line between the last stop signal(which can be a Section signal or an Intermediate Block Home Signal) controlled from one signal box, and the home signal controlled by the next signal block

Question 2

Block Signals

Answer 2

A Stop signal that controls the entrance to, or exit from, a block or intermediate block section.

Question 3

Home Signal

Answer 3

the 1st stop signal controlled by a signal box that controls the exit from an absolute block section

Question 4

Section Signal

Answer 4

a stop signal that controls the entrance to an absolute block section or to an intermediate block section

Question 5

Intermediate Block Home Signal

Answer 5

a stop signal that controls the exit from an intermediate block section, and the entrance to an absolute block section

Question 6

Clearing Point

Answer 6

the point beyond the home signal up to which the line must be clear before a train can be accepted as shown in regulation 3.4.

Question 7

Intermediate block section

Answer 7

the line between the section signal and the intermediate block home signal worked by the same signal box in the same direction of travel

Question 8

Principle

Answer 8

the principle of the absolute block section is to prevent more than one train being in a section on the same line at the same time