[skrebbel]

> If they had built a tunnel to Rostock, things would have been different…

That would’ve been an extremely long (and expensive) tunnel.

[ianburrell]

The Rostock bridge was proposed and this tunnel selected instead.

My understanding is that the water farther east is shallower which makes bridge cheaper. But not enough to be chosen.

[TazeTSchnitzel]

Yes, and it would have required much more investment in rail upgrades in eastern Germany. I can understand why they didn't go for it.