A commuter train crash sent around 70 people to the hospital Friday evening after two trains somehow collided during rush hour. Both of the trains were fully loaded with passengers. None of these passengers died in the crash but many suffered serious and even critical injuries.
Less than 24 hours after the crash, investigators from the National Transportation Safety Board were already on the scene. It will likely take some time before they announce a definitive conclusion regarding what went wrong to cause this wreck - but a number of common problems could have played a role.
One of the first things that investigators will likely consider is whether human error is to blame. According to early reports, the accident happened after one train derailed and a second train failed to stop in time to avoid hitting it. This could point to negligence on the part of the authorities responsible for tracking and guiding the trains.
Like many large vehicle accidents, this wreck could also involve negligent maintenance. Brake performance is often one of the first questions after a crash like this.
Source: Associated Press, "Probe begins after Conn. commuter trains crash," John Christofferson, May 18, 2013