Don't attempt to leave the train on your own. In most circumstances,
that's the most dangerous thing you can do. The tracks may still
be electrified, and other trains may still be in motion around
you. The safest place for you is on the train. If you can't stay
in a car, walk calmly to another car that is unaffected by the
emergency. Don't try to evacuate yourself from the train without
help from the train crew.
Look for a member of the train crew and report the emergency immediately.
The sooner we know about an emergency the sooner we can act to
control it. Don't activate the emergency brake, however, especially
in a tunnel. Once the emergency brake is pulled, we have to reset
brakes before the train can move again, reducing our options for
dealing with the emergency. Use the emergency brake only when the
forward motion of the train presents an imminent danger to life
Listen to instructions from the train crew or from rescue, fire,
or police personnel. The crew has been drilled in emergency evacuations
and knows how to proceed. Stay calm and remain seated. Crew members
will help you exit the train swiftly and safely if an evacuation
is necessary. But usually moving to another car on the same train
is all that's necessary to ensure your safety.