@CNN: Positive train control, or PTC, can automatically slow down and stop a train if it senses the locomotive is going too fast or could get into an accident. Could it have prevented the Amtrak crash in South Carolina? https://t.co/CeJ39AwIbP https://t.co/enfW974Vr9
Positive train control, or PTC, can automatically slow down and stop a train if it senses the locomotive is going too fast or could get into an accident. Could it have prevented the Amtrak crash in South Carolina? https://t.co/CeJ39AwIbP pic.twitter.com/enfW974Vr9
— CNN (@CNN) February 5, 2018