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02-06-2018, 02:50 AM
A crew was upgrading the signals to install the technology known as positive train control, which is designed to prevent the very kind of crash that occurred on Sunday.
More... (https://www.nytimes.com/2018/02/05/us/amtrak-crash-south-carolina.html?partner=rss&emc=rss)
More... (https://www.nytimes.com/2018/02/05/us/amtrak-crash-south-carolina.html?partner=rss&emc=rss)