I agree with being unable to repair bridges, but I think I may have come up with a way to make pontoon bridges, though I'm not sure if it would work.
Now, a new vehicle is needed. A Bridge building Vehicle, e.g. a Titan:
This would work in the same way as a logistics truck, however, it would not drop A supply crate on the right click, it would drop something that looks a little like a section of a building bridge or a large tool box or something. Then, a Squad Leader with the Officer kit can place the Pontoon bridge section (if it were possible to have this only in water/at a lower altitude this would be great) and the dirt mound would fill up the water and the top would be at the top of the water:
By Boris.T.Spider
then the Squad would set about it with spades it would build a section of the Pontoon bridge. Now, per tool box or w.e the Titan drops there could only be so many Pontoon sections (depending on how long the sections are.)
Ok, I haven't thought it out too well and it probably needs alot more thinking, but would it work?
