Three were injured after a gunman attacked passengers on a train in northern France.
The company said it's trying to improve safety in the wake of the deadly crash earlier this month.
The lawsuit, filed in Philadelphia, cited "serious and disabling" injuries from the May 12 derailment that killed eight people and injured more than 200 others.
Amtrak restarted its Eastern Corridor service Monday after suspending it following the deadly Philadelphia derailment.
Amtrak's top official apologized for the crash, which happened just outside Philadelphia Tuesday, killing eight.
The engineer claims he "has absolutely no recollection of the incident or anything unusual."
More than 24 hours after an Amtrak train derailed and crashed in Philadelphia crews recovered another body.
Positive train control (PTC) automatically slows or even halts trains that are moving too fast or heading into a danger zone.
In 1943, some 80 people died in a train crash in nearly the exact same spot where an Amtrak train derailed on May 12.
At least seven people were reported killed and dozens injured as a result of the derailment Tuesday night.
The fires that raged after the accident have stopped burning, but questions remain about oil and rail safety in a region known for toxic spills.
The project is just one of the hundreds of investmenst China have made into infrastructure in the last year
Sunday marked the 14th year of Improv Everywhere's pants-less transit prank, observed by participants around the world.
ISIS is aiming violence at children while recruiting youth to work for its cause, whether by choice or by force.
The train crashed into a ravine after derailing due to a mudslide, 50km west of St. Moritz