Most major national bus lines, such as Greyhound in the United States, National Express in the United Kingdom, and FlixBus in Europe, do equip their long-distance coaches with onboard toilets. These facilities are typically located at the rear of the bus or near the middle exit door. While they are a standard feature on "intercity" routes designed to travel hundreds of miles, it is important to note that these are usually basic chemical toilets without running water for sinks; instead, they provide hand sanitizer. Passengers are generally encouraged to use these facilities only for emergencies, as the buses also make scheduled stops at rest areas or gas stations every few hours to allow for more comfortable breaks and to empty the holding tanks. On shorter regional or "commuter" national lines, toilets may be absent to maximize seating capacity. Always check the specific amenities listed during the booking process if an onboard restroom is a necessity for your journey, as older fleet vehicles occasionally lack them.