Below figure depicts how the vehicle collision damage occurs during the break-out operation, i.e. when a vehicle is being driven out from a stack and to the opening of the designated slopeway. Usually such accidents occurred after two or three hours past the commencement of the cargo operations.
A driver may be compelled to make a large turning in order to make an easy approach to the slopes. During the attempt to break out the vehicle (marked with a star on the figure) is prone to hit another one moved out from the nearby stack in the hold.
The above situation clearly indicates the lack of coordination which is supposed to be done by the signalman and/or crew.
Countermeasures
For Signalman and Crew:
- Stand ahead of passenger side of the vehicle.
- Checked the following at the break-out operation: the front wheels are straight, the driver’s hands are kept neutral position.
- Keep steering wheel straight unless the vehicles was moved well ahead (at least one car's length).
- Always follow the signalman's instruction - self-judgement is strictly prohibited.
Best practice
The most experienced driver(s), normally a foreman and his assistant, undertake(s) duty of breaking out the vehicles and positioning them just in front of the slope ready to be driven out by the next pack of riding drivers. Key is already inserted, electronic safety switch is turned off, car is ready to drive. Sometimes during high intensity operations, when it is safe to do so, the driver's door is left open as well.
