CNN New Day May 18, 2015 12:05:00
Some people. >> positive train control includes an element which is the communication based signaling. the systems have been in place since the 1800s and the type of signals and what they mean. communication based signaling would have direct input into the automatic train control. they group those together as positive train control. thats what they are talking about when they talk about automated train control. >> so why hasnt that been there? is this money? is it congress dragging their feet? w...
Source: archive.org