What is fixed block signalling?

What is fixed block signalling?

Fixed block signalling divides the track into small blocks which determines how far apart the trains will be kept for safety and how frequently the stations will be serviced.

What is fixed block system?

In fixed block systems, the Movement Authority consists of a locked train route starting at a certain signal with a proceed aspect and ending at another signal with a stop aspect, passing through one or more track sections.

What is fixed block and moving block?

Moving block utilizes the track in the most efficient manner while ensuring safety. Fixed block signalling was a first great step in the evolution of signalling, but it has out lived its usefulness at a time when all transit authorities are demanding shorter headways to move more riders using the same infrastructure.

What is a block signal?

Definition of block signal : a fixed signal at the entrance of a block to govern railroad trains entering and using that block — compare block system sense 2.

What are the differences between traditional fixed block systems and modern moving block CBTC?

Unlike the traditional fixed block systems, in the modern moving block CBTC systems the protected section for each train is not statically defined by the infrastructure (except for the virtual block technology, with operating appearance of a moving block but still constrained by physical blocks).

What is a train block signal?

In railroad: Signaling. In these so-called block systems, a train is prevented from entering a specific section of track until the train already in that section has left it.

What are block systems?

block system (plural block systems) (rail transport) On railways, a system by which the track is divided into sections of three or four miles, and trains are run by the guidance of electric signals so that no train enters a section or block before the preceding train has left it.

What is moving block Signalling?

In railway signalling, a moving block is a signalling block system where the blocks are defined in real time by computers as safe zones around each train.

What is semi automatic signal?

Semi-Automatic Signals They operate in the same way as automatic signals in that they protect a section or block. The difference is that, instead of returning to green automatically as soon as a train clears the block, they remain at “danger” until receiving a “proceed” instruction.