When the gradient is negative trains freewheel down the slope, and the power source is only used to keep the lights, heating, and electronics running.
This is genius. But could anyone confirms this. I try to do some google search and nothing useful or related came up.
Does that mean Trains are constantly running downhill? Because that doesn't seems to be the case long distance rails.
They obviously need power to maintain speed going uphill.
When the gradient is negative trains freewheel down the slope, and the power source is only used to keep the lights, heating, and electronics running.