Train toilets that discharge waste directly onto the tracks have raised concerns about hygiene and environmental impact. This system, designed for simplicity, allows waste to be expelled while the train is moving, preventing unpleasant odors and water accumulation. Designers believed that the high-speed motion and wide track gaps would reduce environmental harm, with waste dispersed by airflow.

Despite this, tracks remain relatively clean due to regular maintenance, favorable environmental conditions like rain and wind, and technological innovations. Some modern toilets use sealed waste containers, collecting waste for disposal at stations.

While some passengers find this design uncomfortable, the railway industry is increasingly aware of environmental issues and passenger comfort. Advances in technology, such as biological toilets that convert waste into harmless substances, promise more sustainable and hygienic solutions for the future. Ultimately, the goal is a balance between convenience, cleanliness, and environmental protection in train travel.