The term hand luggage or cabin baggage (normally called carry-on in North America) refers to the type of luggage that passengers are allowed to carry along in the passenger compartment of a vehicle instead of a separate cargo compartment. Passengers are allowed to carry a limited number of smaller bags with them in the vehicle, which typically contain valuables and items needed during the journey. There is normally storage space provided for hand luggage, either under seating, or in overhead lockers. Trains usually have luggage racks above the seats and may also (especially in the case of trains travelling longer distances) have luggage space between the backs of seats facing opposite directions, or in extra luggage racks, for example, at the ends of the carriage (train car in American English) near the doors. Commercial air travel Hand baggage allowance is a topic frequently discussed in the context of commercial air travel. On the one hand, passengers may want to have more of their possessions at hand during flight, skip the often time-consuming baggage claim process, and avoid the risk of having their checked baggage lost or damaged. On the other hand, safety concerns, takeoff weight limitations, and financial incentives (e.g. charging for checked bags) cause airlines to impose limits on how much and what passengers can take into the aircraft cabin. A large amount of hand luggage also slows the security screening of passengers, and can slow boarding as it takes longer to find space in cabin storage areas. Studies have found that passengers often pause to retrieve cabin baggage during an emergency evacuation, despite instructions to the contrary in pre-flight safety briefings. This is not a new phenomenon, as it was observed during the evacuation of a Boeing 737 that caught fire in 1984. At least one passenger re-entered a Boeing 777 that crashed in 2008 to retrieve personal belongings. Video of the evacuation of a Sukhoi Superjet that caught fire on landing in 2019 clearly shows passengers on the emergency slides with large suitcases, raising questions as to whether this contributed to the loss of life. Remote locking of overhead baggage bins is being considered as a solution to the issue. Allowances The International Air Transport Association (IATA) sets guidelines for cabin baggage/hand luggage/carry-on luggage size. As of 2022, the IATA recommends a maximum size of 56 cm × 45 cm × 25 cm (22 in × 18