Definition of permissive blocking. Meaning of permissive blocking. Synonyms of permissive blocking

Here you will find one or more explanations in English for the word permissive blocking. Also in the bottom left of the page several parts of wikipedia pages related to the word permissive blocking and, of course, permissive blocking synonyms and on the right images related to the word permissive blocking.

Definition of permissive blocking

permissive blocking
Block system Block system (Railroads) A system by which the track is divided into short sections, as of three or four miles, and trains are so run by the guidance of electric, or combined electric and pneumatic, signals that no train enters a section or block until the preceding train has left it, as in absolute blocking, or that a train may be allowed to follow another into a block as long as it proceeds with excessive caution, as in permissive blocking.

Meaning of permissive blocking from wikipedia

- up into a series of sections or "blocks". Only one train may occupy a block at a time,[citation needed] and the blocks are sized to allow a train to stop...
- Permissive Working on a railway in the United Kingdom allows more than one train at a time to be on the same line in a block section, a signal section...
- A permissive action link (PAL) is an access control security device for nuclear weapons. Its purpose is to prevent unauthorized arming or detonation of...
- block before the signalman sees that the disc or lamp is missing, they ask the next signal box to stop the train and investigate. Under a permissive block...
- on a few suburban sections from 1900. Tyer's Three-Wire Block was used for permissive block working on the Up Relief line from Concord West to North...
- restricted permissiveness) is used in low traffic areas with block lengths up to 15 km. In both cases they are similar to the UK automatic block signalling...
- Negative Sequence Directional Overcurrent 68 - Blocking Relay / Power Swing Blocking 69 - Permissive Control Device 70 - Rheostat 71 - Liquid Switch...
- operated under Absolute Block regulations, and the outer lines were designated Goods Lines, and they were worked under Permissive Block regulations. Whereas...
- Great Firewall of China, which blocks websites. Methods used to block websites and pages include DNS spoofing, blocking access to IP addresses, analyzing...
- collision with a freight train at Conington, Huntingdonshire during permissive block working. A second freight train then ran into the wreckage. Locomotive...