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There is a lot of tribal knowledge in the railroads. For example, if you are coming down a hill and there is another hill on the other side of the bank, you might need overspeed for two miles an hour. Otherwise you are not going to make it up on the other side of the hill. The drivers know this. They’re allowed to do it. But if there is a rule on a computer, then the computer won’t violate it. Using behavioural analysis tools to detect those anomalies and then have our engineers investigate it, helped us rapidly improve the driving strategy and tune it for that particular customer.