Safety and transportation expert, Brigham McCown, explains PTC and how it will decrease derailments.
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![](https://s2.save4k.ru/pic/TcxJTIlH_8U/maxresdefault.jpg)
Safety and transportation expert, Brigham McCown, explains PTC and how it will decrease derailments.
Tweet us your questions at @AiiNonProfit or email us at info@aii.org.
Visit us for more at [ Ссылка ]
#Aii #AskAii