On September 12, a commuter train and a freight train collided head-on in Chatsworth, killing 25 people on board the Metrolink train, including engineer Robert Sanchez. Dozens of other people were injured in the crash.
Times on the condition they not be named.
There is no evidence to show that any teenagers were riding in the cab of the commuter rail with Sanchez on the day of the crash.
Unauthorized ride-alongs are a serious violation of safety regulations.
A preliminary investigation into the deadly disaster showed Sanchez ran through a red signal light and slammed into a Union Pacific freight train on a section of shared track.
The National Transportation Safety Board is preparing to release details on text messaging and other factors during a two-day hearing that begins Tuesday in Washington, D.C.
Safety investigators have said that Sanchez received and sent 57 text messages while on duty the day of the crash, including one 22 seconds before impact.