As you noted in the beginning of your report, a new era has begun for an old mode of transportation. High speed will allow railroads to win points against its traditional enemies (automobiles and airplanes), which have evolved so much that they now find themselves saturated.
正如文中所指，原屬傳統交通工具的火車，即將因為「高速」而開創新的紀元。汽車及飛機以快速成長之勢，很快就將達到飽和狀態，而新式火車因為「高速」，才有可能打敗這兩個長久以來的對手。