safety device of the railway transfer trailer

Safety is attentioned by all of us, for the emergency things may happened at any time and any where. And we cannott hold it, but the cart is equuipped with high efficiency safety device to ensure the safety for all of us.
The safety device is include (a) emergency stop button, it is installed on the control box, and we we meet the emergency things or the cart is out of control, then push it, and the car will be stopped immediately, the just clockwise turn the button, the car back to normal work.
(b) Warning light, it is a safety device installed on the both side fo the cart, and when the cart begin to work, it always flashing, warning the around people to notice it.
(c) Limite switch, when the running close to rail ends, and touch the track welding angle iron, automic power off, stop running car accordingly, to prevent car runn off the track.
(d)Bumper, this safety device is To eliminate the collision damage to the cart.
Here are many other safety device, such as the rail sweep, proximity switch, warning sign,etc.for the high safety performance.