You may want to check out how the Comm Ave bridge over the Pike was replaced in Boston. It was pretty quicke although not as fast 43 hours. However, we also c

You may want to check out how the Comm Ave bridge over the Pike was replaced in Boston. It was pretty quicke although not as fast 43 hours. However, we also couldn't afford to close the lower road (I-90) as above for an extended staging effort. I believe rail lines were only impacted on two weekend pushes. https://www.youtube.com/watch?v=zNiACLQtHyg https://www.youtube.com/watch?v=zNiACLQtHyg