Do you guys think holding municipalities financially responsible for negligent road design leading to death would be an effective way to improve road safety? Infrastructure design is a contributing factor in many (if not most) road deaths, so I don’t see why municipalities should be able to escape liability here.
In my mind, this is kind of similar to how air travel safety works. A pilot may crash their plane, and be 100% at fault for it, however regulators, airlines and manufacturers will still look at the incident and see what can be changed to ensure an incident like this never happens again. This proactive attitude with regards to airplane safety has made air travel virtually the safest form of transport around.
I hope that holding municipalities responsible for poor road design would foster a similar proactive attitude with regards to road safety. A municipality will be a lot less willing to negligently risk the lives of their residents on their roads if they know that doing so would lose the municipality millions of dollars. In that kind of environment, something like separated bike lanes suddenly becomes an important financial investment, as opposed to something that's just "nice to have".
This move would also change road safety from being a purely political debate, to also being a financial and legal debate. It's a lot easier to push for these changes at local City Halls, when you can say "this will be the financial impact of our negligence".