This. Actual dry leaves that can be blown off really aren't the trouble, it's wet ones that quickly turn into sludge and just get compressed into slicker and slicker slime that provides no traction.
The current solution in most of the world is essentially high-pressure jets of water to clean the rail; obviously you eventually reach a point where you don't have enough pressure to dislodge the goop.
The current solution in most of the world is essentially high-pressure jets of water to clean the rail; obviously you eventually reach a point where you don't have enough pressure to dislodge the goop.