What does APB mean in Railroads?

This page is about the meanings of the acronym/abbreviation/shorthand APB in the Regional field in general and in the Railroads terminology in particular.

Absolute Permissive Block

Railroad signalling system.

Regional » Railroads

Translation

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Definition

What does APB mean?

APB
APB was a Scottish post-punk band, formed in 1979, that blended funk rock, punk rock and New Wave music. The group had only modest success during its brief run, yet their influence can be heard in the sound of such current bands as Franz Ferdinand, The Rapture, and Red Hot Chili Peppers.

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"APB." Abbreviations.com. STANDS4 LLC, 2015. Web. 28 Jul 2015. <http://www.abbreviations.com/term/110905>.