They will win this lawsuit. Its happe ed multiple times whe folks drove into lakes etc. Was a common issue in the early days of GPS navigation. And is proove n again and again that navigation systems are not responsible for your inability to look where you are driving.

As for bridge repair. Well apparently this was a privrate road. But if not. Whike there is grounds to sue the authority for failing to do thier job. Seems very unlikely they can be held accountable for the inability of the driver to stop within his visual range. I have been licenced (before losing my vision) in both the US and UK. Passing test in both. As crap as the US test was. Stopping distances and the effect rain and visibility has was clearly mentioned i the question pool.