A moving train collided with a train stopped ahead of it. 2. The operator of the striking train applied the emergency brake after the stopped train came into full view but there was not enough time to prevent the collision. 3.20 buses were mobilized to transfer passengers, so they won't be very crowded. 4. A power failure knocked out service on the line 25 minutes ago. 5. The struck train came to a stop because of trffic ahead.