The technology that could have stopped the New Jersey train crash

A train that smashed into the station in Hoboken, New Jersey during rush hour on Thursday likely wasn't equipped with a technology called positive train control that could have prevented the derailment. 

Positive train control is a speed-limiting technology that is built to "automatically stop a train before certain types of accidents occur," according to the website of the Association of American Railroads. Those accidents include train collisions and derailments.

Thursday's accident involving a New Jersey Transit train left at least one person dead and injured around 100 others. New York Congressman Sean Patrick Maloney tweeted Thursday that having the technology installed could have saved lives.  Read more...