Saying "Yhank you" as you get off the bus is normal practice here. But the drivers don't say "You're Welcome", that would feel a bit peculiar. They might give a nod of acknowledgement, but I don't know, because I'm not generally looking in their direction when I get off the bus.

At supermarket checkouts there can any number of "Thank You"s going back and forth. Hand them a storecard, "Thank You", pay the money "Thank You", get your change, "Thank You", get the receipt"Thank You", get the storecard back "Thank You", get offered a bag, "Thank You", if they pack it, "Thank You" and a final mutual "Thanks" as you part.    But no "You're welcome".