National Positive Train Control Technology Could Be A Solution For Amtrak After Recent Crashes 5:22pm February 06, 2018 News Technology National Share URL copied to clipboard! Copyright 2018 NPR. To see more, visit http://www.npr.org/. 300x250 Ad More All Things Considered Science Shortwave podcast explores Pluto's planetary demotion National Appalachian writer revisits J.D. Vance's 'Hillbilly Elegy' by Andrew Limbong 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate