Building a road to my town, even if few people live there is a standard thing that taxes pay for. I'm pretty sure there is not enough traffic for regular ferry

Building a road to my town, even if few people live there is a standard thing that taxes pay for. I'm pretty sure there is not enough traffic for regular ferry service there, yet the govt keeps running it. Maybe they reduce it in the winter, but its there. That island would probably hardly have anyone there if there wasn't regular ferry service.