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The earliest form of rail transportation actually dates back to 600 B.C. The Greeks made grooves in paved limestone roads to use with wheeled vehicles
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The first modern railroad did not show up until 1501, but they did not use trains on them because they were not invented yet.
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By 1770s the wooden railroads have been replaced with iron ones. The iron wagonways evolved into tramways that spread across Europe. They also used horses to help with pulling the wagon.
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By the 1860s sparking the rapid expansion of railroads not only across America but around the world. Eventually, the Bessemer process was replaced by the use of open-hearth furnaces, which further reduced the cost of steel production and allowed trains to connect most major cities in the United States by the end of the 19th century.
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By the 1930s, the Pennsylvania Railroad had electrified its entire territory east of Harrisburg, Pennsylvania.
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In the 1960s and early 1970s, there was considerable interest in the possibility of building passenger trains that could travel much faster than conventional trains.
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Prior to the opening of the transcontinental railroad, it took four to six months to travel 2000 miles from the Missouri River to California by wagon.
