Droppings from train crossings

How many people have looked at train crossing, especially in the third world, where there is a higher concentration of people, and wondered about the metal plate that covers the tracks in these crossings. The reason why the crossings are covered with a metal plate is to prevent accidents; not the type where a train collides with something, but the type where a person used the restroom of the train when it is on a crossing, and the refuse drops below the train:

Ahmedabad: Two-wheelers come to a screeching halt at the incline when a train passes over Madalpur underpass, near Gujarat college. These riders are afraid of a spoiling their clothes with the droppings from the train above. If a train takes long, there is a near traffic jam with approximately 50 to 60 vehicles waiting on both sides.
This happens at least 10 times a day and the volume of the vehicles doubles at peak hours. The metre gauge tracks on the top don't have a cover to protect the two-wheeler driver from the disgusting showers.

It is simple task to ensure that a metal plate is available, but it sometimes takes some amount of media attention to ensure that such provisions are available.