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.
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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.