Why are the toilets on the train connected directly to the tracks?

As cities grew and environmental awareness increased, pressure mounted.

Governments and rail authorities began to recognize that:

Dumping waste on tracks was unsanitary

It posed health risks to workers

It polluted nearby environments

It damaged public perception of rail travelTravel & Transportation

Gradually, regulations began to change.

Modern Train Toilets: What Changed?
Today, many modern trains use retention toilets or vacuum systems, similar to those on airplanes.

These systems:

Store waste in sealed tanks

Control odors

Prevent discharge onto tracks

Are emptied at designated facilities