For example , at Gresford railway station in Australia , the gradient was so steep that a refuge siding was required at the station in case some of the wagons or coaches of a train had to be left behind .
It could climb the hill .
For example , at Gresford railway station in Australia , the gradient was so steep that a refuge siding was required at the station in case some of the wagons or coaches of a train had to be left behind so that it could climb the hill .