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I found a mistake:
This paragraph:"
There are 250000 railway freight cars delivering rail cars, according to that 125000 railway freight cars drive at the same time, the transport capacity of delivering cars is 600 million car-km every day and 219 billion car-km every year. Because the speed of 200 km/h is faster than the speed of 100 km/h on existing highway, and automotive driving is labor saving and safer than manual driving, I estimate once the small cars are put into operation, railway companies will gain significant market which belongs to highway now. If only 0.2 US$ per car-km, yearly revenue is 43.8 billion US$."
Should be change to:
There are 250000 railway freight cars delivering road cars, according to that 125000 railway freight cars drive at the same time, the transport capacity of delivering cars is 600 million car-km every day and 219 billion car-km every year. Because the speed of 200 km/h is faster than the speed of 100 km/h on existing highway, and automotive driving is labor saving and safer than manual driving, I estimate once the small cars are put into operation, railway companies will gain significant market which belongs to highway now. If only 0.25 US$ per car-km, yearly revenue is 54.75 billion US$.
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