I think Google answered a different question from the one you asked. It talked about the number of sleepers and coaches, and a rationale. But the seasonal switch usually refers to whether the sleepers are up front or bring up the rear.Why the seasonal switch on this route and not others? The AU search engine returns a Google error but using Google search I get the following: In summer there's often demand for an additional sleeper, in winter there's often demand for an extra coach (Donner snow so people don't want to drive). Is that still the best guess as to the logic?
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