As I understand it, hazardous material loads cannot be transported through tunnels. So having a bridge that allows that (and prevents the need for hazmat loads

As I understand it, hazardous material loads cannot be transported through tunnels. So having a bridge that allows that (and prevents the need for hazmat loads being routed through the city center) does make some sense. I suspect the cost of a bridge replacement might also be cheaper than both a tunnel and redoing all the roadways and infrastructure leading up to it, but don't know for certain. If anyone has a more informed estimate, please share.