what does this ! mean when next to abridge on the map?

[Ricky B]

Depends on the game and graphics you are running. But in the first and only game I checked, the ! symbols were related to damaged bridges and ferries, and nothing else. So the next question would be what game, and are you running custom graphics? The ! would be a graphic, that can be changed to or from another graphic, signaling something related to the map and items as you suggest.