"Two, there is no bike lane. And given the freight orientation of the bridge, there will never be one."
There is no need for bike lane. There is a very wide and unused walkway that did and would work safely, comfortably and without interference.


"Three, when traffic gets going, it is a lot faster than your bike. "
Speed limit is something like 30 MPH and when crawling, as it often can be, a bike is faster than the traffic.

If you had an opportunity to bike the bridge, I think you would come away with a different point of view.