Originally Posted by
acidfast7
Not always. It could be built as a toll-based system.
This bridge is totally user-financed with no other funding streams.
Øresund Bridge - Wikipedia, the free encyclopedia
Currently it is 335 DKK / 400 SEK / 46 EUR /
58.2 USD per car to cross.
For a lorry/truck, it's 250 USD or so

I guess the high tolls are an attempt to expose all external costs. Good for them. I'm surprised anyone accepts it, though.