sullivan1985 In reply to Fritzchen-26 [2010-07-01 02:27:27 +0000 UTC]
Yeah that high pitched pinging sound is a good way to detect movement in welded rail territory. As the rails depress under the weight of the train they emit that noise which becomes more intense as the train becomes closer. Don't count on it as a safety feature, but it's just one of the many things that can keep you informed if your alert to your surroundings. You wont notice that sound in jointed rail territory though nearly as much as welded.
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