What is the mandatory emergency protocol if a heavy freight truck stalls or becomes stranded on a railway level crossing (铁路道口) and cannot be restarted or moved?

1. Immediately get all occupants clear, take every available measure to move the vehicle and any spilled load out of the crossing, and if it cannot be moved at once notify the crossing keeper or railway operator while signalling any approaching train from as far away as possible
2. Lock the cab doors, sit inside, and honk the truck horn to warn the approaching locomotive to swerve
3. Unload all heavy cargo onto the railroad tracks to build a defensive barricade
4. Pour diesel fuel on the rails to reduce train braking friction