[bobthepanda]

That's also a thing.

But note how the main bridge piers are on giant islands much larger than the pier itself: https://en.wikipedia.org/wiki/Dolphin_(structure)#/media/Fil...

If you really want to make it unblockable you build a bridge+tunnel. https://en.wikipedia.org/wiki/Bridge%E2%80%93tunnel

[js2]

The CBBT is downstream of the bridge which collapsed. I've driven it many times.

https://en.wikipedia.org/wiki/Chesapeake_Bay_Bridge–Tunnel

[KWxIUElW8Xt0tD9]

It has tunnels because the Navy did not want the bay blocked if the bridge dropped into the water. Which is exactly what has happened in Baltimore.