Talk:Automatic train stop
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[edit] US Requirements
This article formerly claimed that trains above 79 mph require automatic train stop. It has been my understanding that the FRA, in general, only requires cab signaling at those speeds, and does not actually require automatic train stop (though once you have cab signaling, you've already spent most of the money that needs to be spent to make automatic train stop happen), so I felt that deleting that text that lacks a citation that I believe is likely to be wrong is the right way to follow wikipedia's guidelines. If a reasonable source can be found to cite that supports this 79 mph claim everywhere, putting the text back with a reference would be fine. Since the Chase, Maryland rail wreck article claims that cab signaling is required on the Northeast Corridor, however, I put that in the article. JNW2 (talk) 04:32, 17 December 2007 (UTC)