By Hinkmond-Oracle on May 15, 2015
Here's a description at the L.A. Times Web site of how positive train control works using IoT techniques and Big Data.
Here's a quote:
En route, the train’s position and speed are tracked via GPS. Signal status, broken rails, curves, etc. come in from wayside devices. Using these data, the system tells the engineer when to adjust speed. If the engineer doesn’t act, the system takes over, adjusts speed and, if necessary, brings the train to a stop.In light of the tragic train derailment in Philadelphia, it's always good to review things that can prevent this type of horrific occurrence in the future.