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Cab signals and blocks
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<p>Howdy all,</p> <p>Railroad signaling is one of my favorite aspects of railroading, but I'm having trouble understanding how cab signals operate. For those who don't know (but want to follow along), these are indications in the locomotive cab that augment or replace fixed wayside signals.</p> <p>My question relates to typical US pulse-code signals, developed by the PRR and now the de facto standard in the country. Several of my local railroad lines use NORAC Rule 562, with wayside signals at interlockings only -- all intermediate automatics are cab-only.</p> <p>I understand that this style of cab signal is continuous and signals can upgrade or downgrade at any time...but how do signal blocks work between interlockings? Are there specific blocks that are controlled by cab signals, exactly like a standard signal installation, but without the physical waysides? How are they marked?</p> <p>I consider myself very signal-savvy, I'm just having trouble wrapping my head around this one. Any insight would be appreciated! Thanks!</p>
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