In today’s convenient transportation system, trains have won the hearts of many travelers due to their unique advantages. However, a concerning and controversial phenomenon while traveling by train is that the toilets on trains are directly connected to the tracks.

This design surely raises doubts for passengers, especially from a hygiene and environmental protection perspective. Many people can’t help but wonder: Why do train toilets use a system that discharges waste directly onto the tracks? Does this result in dirty tracks?

First, let’s explore how train toilets work. Traditional train toilets often use a “direct discharge” system, meaning that when passengers use the restroom, the waste is discharged directly through a pipe onto the tracks below. Continues…