Bringing Your Food Aboard You may bring your own food and beverages onboard for consumption at your seat or private Sleeping Car accommodations. However, you can only consume food and beverages purchased in Dining and Lounge Cars in those cars.

Yes, you can generally eat a sandwich on the train in most countries, but the specific etiquette and rules vary depending on the type of service. On long-distance and high-speed trains like Amtrak in the U.S., the TGV in France, or Shinkansen in Japan, eating at your seat is a standard and expected part of the journey. Many of these trains even have fold-down trays and on-board cafe cars that sell sandwiches. In Japan, the "Ekiben" (station bento box) is a celebrated cultural tradition specifically meant to be eaten on the train. However, on local commuter trains or subways (like the London Underground or the Tokyo Metro), eating a full meal can be seen as impolite due to limited space and potential odors, though a discreet snack is usually tolerated. Some transit systems, like the Washington D.C. Metro or certain buses in Singapore, strictly prohibit eating and drinking to maintain cleanliness, with fines for violations. As a general rule, if the train has a tray table, eating is perfectly fine; just be mindful of strong-smelling foods and ensure you dispose of all trash in the provided bins to keep the environment pleasant for your fellow travelers.