What is the definition of Absolute Block in train operation?

The definition of Absolute Block in train operation refers to a section of track that may be occupied by only one train at a time. This system is designed to ensure safety and prevent collisions by providing a guaranteed clear space for an individual train. When a train is given permission to enter an Absolute Block, no other train can enter that same block until it has cleared and the block is reset for use.

This operational method is a crucial component of train signaling and safety protocols, establishing definitive control over sections of track. By restricting the occupancy of a block to just one train, it effectively mitigates the risks associated with multiple trains potentially conflicting on the same track segment.