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The development of steel was critical to the development of railroads, as the rail lines were made up of steel. In American history, it is evident that the increased production of steel at lower costs resulted in the expansion of railroads in the US. For example, after Andrew Carnegie brought the Bessemer process to the US the railroad industry changed forever. The Bessemer process was one that made steel much more efficiently and cheaper than ever before. After the success of this process, developing railroads were much cheaper.
trud1938

Answer:

Which reasons did you include in your answer?

Railcars and tracks were made from steel.

Bridges used by railroads were made from steel.

Railroads transported the raw materials needed to make steel.

Railroads transported finished steel goods.

Explanation:

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