Yeah - think the Class Is are still teaching the rulebook signals. I did hear, on the Santa Fe in Texas a few years ago, some kind of automated whistle as the train came through town and a lot of crossings .... it was so regular it had to be a computerized control ..... I actually found it to be irritating, because it was obviously not a human pulling the whistle valve. Long-long-short-long every few seconds all the way through town, regardless of whether they were approaching a crossing at that time.
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