Virtually all medium and long-distance passenger trains worldwide are equipped with onboard toilet facilities, though the quality and location vary by train type. On High-Speed Trains (like the Eurostar, Shinkansen, or TGV) and Intercity services, you will typically find at least one or two toilets in every carriage, usually located at the ends of the car. Modern trains use vacuum-flush systems (similar to airplanes) that store waste in a holding tank for disposal at the depot, which has replaced the older "drop-chute" systems that emptied directly onto the tracks. These modern toilets often include "universal access" (ADA-compliant) units that are much larger and feature automatic doors and panic buttons. However, on short-distance commuter or suburban trains designed for journeys of under 30–60 minutes (such as the London Underground or the NYC Subway), toilets are almost never provided on board to maximize standing space and reduce maintenance. In 2026, many newer "Sleeper" trains (like the Vande Bharat or European Nightjets) have introduced enhanced sanitation with "bio-toilets" and advanced disinfectant technology to ensure a hygienic environment for overnight travelers.