Also, you shouldn’t worry too much about lines that are in the red. They’re still feeding into your transport system and their existence, so long as you have a high enough frequency, is still buffing the income from your other profitable services. Just aim for good service and encouraging high overall ridership rather than specifically trying to make everything profitable. Adequate frequency may require more buses than are necessary for full passenger transport but as long as your main train lines are making, say, a million or 4 each then it doesn’t matter if you lose 20k here and 100k there.
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