Stations usually have staffed ticket sales offices, automated ticket machines, or both, although on some lines tickets are sold on board the trains. Many stations include a shop or convenience store. Larger stations usually have fast-food or restaurant facilities. In some countries, stations may also have a bar or pub. Other station facilities may include: toilets, left-luggage, lost-and-found, departures and arrivals boards, luggage carts, waiting rooms, taxi ranks, bus bays and even car parks. Larger or manned stations tend to have a greater range of facilities including also a station security office. These are usually open for travellers when there is sufficient traffic over a long enough period of time to warrant the cost. In large cities this may mean facilities available around the clock. A basic station might only have platforms, though it may still be distinguished from a halt, a stopping or halting place that may not even have platforms.