This is a good example of how AI can be used well.
Current AIs are effectively fuzzy pattern detection and matching engines. This one can sift all the data coming in, and spot patterns that previously corresponded to problems. It then flags them for human interpretation.
The AI chunks the vast sea of data. A human is then involved to sanity check what it has found, and react accordingly. E.g. a pattern appears that often precedes a broken rail within a month. A human can check the subset of the data, and schedule a maintenance team a week later. Conversely, a pattern that leads by hours would require an immediate response.