Title: Train Content: A train is a set of railway cars (also called vehicles) that are tied together with or without a locomotive. Trains are used to carry people, and also things like raw material, finished goods, cargo, and waste. The vehicles that carry freight are called cars (in the United States) or wagons (in the United Kingdom). The ones that carry passengers are often called coaches or carriages. A place where a train stops to let people get on and off is called a train station or railway station. ==History== thumb|Historic train pulled by a horse Before steam trains there were wagonways where horses and people pulled cars over tracks made of stone and wood. A steam train made it's first journey on 21 February 1804 at the Penydarren Iron Works in Merthyr Tydfil, Wales, UK. The locomotive Coalbrookdale was built by Richard Trevithick helped by the owner of the ironworks Samual Homfray. The Stockton and Darlington Railway in 1825 showed how a train could be run. The use of trains were then to go from country to country over the world, and it was more easy for people and things to get from one place to another place.Marshall (1975). pp. 149, 152 As the internal combustion engine that used petroleum oil and diesel oil got better people tried to use those those, but they were not very successful at first. The year 1913 in Sweden was when the first successful in the world ran, and it was able to keep going until 1939.Marshall (1975). p. 150 The 1920s saw diesel trains get better and by the 1930s diesel trains were going very fast, including the a German train going from Berlin to Hamburg at over and a train going from Denver to Chicago, without stopping at an end-to-end speed of .Marshall (1975). pp. 150–152 While the first small railway run by electricity was in 1835 it was about after the 1890s when more electric railways and trains started across the world.Marshall (1975). pp. 155–161 After World War 1 there improvements in road cars and buses and people began to use them more than trains.Ross (2003). p. 7 The same was true for how things were moved. From the 1950s the aeroplane became a better way for people to go to some places that were further away. Trains and railways had to get better to stop losing people and things to cars and aeroplanes but many have had to close. == Types of train == === Freight === thumb|right|Freight train hauled by diesel locomotives. Freight trains have freight cars (US) or goods' wagons (UK) to carry goods from one place to another. Some are boxcars (closed and roofed cars for cargo); others are special so they can carry special cargo. There are hopper cars for sand, coal, ore and other granulous (sand- like) materials, flatbed cars for vehicles and machinery, tank cars for liquids, container cars for containers and even bottle cars for molten iron. Almost anything which is not too large to fit under tunnels and bridges can be transported on special freight cars. === Passenger === Passenger trains have passenger cars (US) or coaches (UK) made so people can ride them from one train station to another. Passenger trains are usually a very comfortable way of traveling. Many trains have electrical outlets and Wi-Fi hotspots for computers, Most passenger cars are single-deckers: there are also double- decker passenger cars, such as the Finnish Inter-City cars. Some trains look like a special bus that can only drive on rails. The world's longest passenger train was long and had 100 cars. It was a special train that ran in October 2022 in Switzerland. ====Trains in the city==== thumb|Busy train in Egypt (2019) To get to a city and to move around it trains may need to carry many people and they can get very busy. There are many names for this type of train including rapid transit.West (2015) pp. 14-15 The railway for these trains may go underground or be above the road. Trains which go along city roads are called Trams.West (2015) pp. 18-19 A new word for trams that also use tracks used by other trains outside the city is tram-trains. ====Trains that go far==== There are few long-distance passenger trains in the United States, but more in Europe and Asia. They may have a special car where you can eat. Sometimes there are also sleeping cars (passenger cars with beds) for long overnight voyages. ====Very fast trains==== High-speed rail uses special, fast passenger trains on special tracks.West (2015) pp. 11-12 A few of the fast ones are maglev trains, using magnets to hover slightly off the tracks to have less friction.West (2015) p. 22-23 == Crew == * The driver or engineer makes sure the train works right, and speeds it up or slows it down. Usually a train needs a driver to make it run well, but a few are run by computer. * The guard or conductor makes sure the train goes the right way and tells the driver if he makes a mistake. * Only steam trains have a fireman. He makes sure the fire that powers the steam locomotive is burning properly by putting coal into the fire. == Propulsion == thumb|right|A steam locomotive. Most trains are pulled by locomotives. Before 1900, almost all were steam locomotives. As this kind of steam engine uses very much fuel for the work it does, steam began to give way to diesel locomotives and electric locomotives during the 1930s. Today, most locomotives are diesel-electric locomotives. Sometimes a train has no separate locomotive, but the prime mover (diesel engine or electric motor) is located on the first car of the train itself, and the car has engineer's cabin. The car is called a "motor unit". Some trains have motors in many or all of the cars. This is called a diesel multiple unit or electric multiple unit. Usually, both ends of the train have engineer's cabins. These trains are especially popular in commuter traffic in large towns and cities. Electric trains get their power from a third rail or from overhead wires. The fastest train in the world is a special type of train using maglev propulsion, and it can reach .