They did the same with an old wooden bridge near where I grew up. In the early 80s, you could still drive across it. Later they closed it and barricaded it. Eve

They did the same with an old wooden bridge near where I grew up. In the early 80s, you could still drive across it. Later they closed it and barricaded it. Eventually in the 2000s, they preserved it and built a park around it. Of course, this bridge only carried about 10 cars a day, mostly as a novelty, prior to closing. It's an entirely different animal to close a bridge in a major city.