I'm a bit confused by your description. Are you getting a ticket for parking IN your driveway, or parking in front of it? What do you mean by your driveway pad?
I don't see how a bus zone can block your driveway, so not sure what the problem is. Even if the bus zone was up to your driveway, you technically shouldn't be parking in front of your own driveway anyways, so the sign on one side vs the other shouldn't make any difference where you are allowed to park.
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