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Block Size over the years?
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In my [almost] 25 years of service as a Signalman/Signal Maintainer for the N&W and NS, I can readily attest that block lengths on the former Wabash main through west central Indiana / east central Illinois have increased from the Wabash days. The advent of ElectroCode and other types of electronic signalling have allowed block lengths to increase and in some places, we have blocks that are almost three miles in length. Longer blocks equate into less signals and lower maintenance costs and I believe for that reason, most railroads today are lengthening blocks and not making them shorter.
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