When the first trains started ambling down their tracks, excessive speed that could cause derailment was not a factor. Nor was there concern about the amount of traffic travelling the rails. But obviously throughout the years, the railway system has undergone significant evolutions that moved it from merely an efficient method of transportation to a vital means of economic development. This has significantly increased both the dependence on railroads for mass transportation of goods and people as well as the need for a more efficient system to manage the larger traffic network.
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