
Quoting
cdwjava
First, CalTrans is not the arbiter of the law and they do not oversee cities and their contractors. What they're saying about an unknown situation cannot be taken as gospel. Second, if the other car turned into your land and caused the collision, your claim will be with that vehicle's insurer. From what you have written, you have yet to make a claim with the other driver's insurance provider. Have you at least reported it to your own insurer? In most cases THEY can handle the matter on your behalf.
Now, if there was improper signage or notification of the road obstruction, the vehicles actually forced to deviate from the path might have a claim against the city or the contractor doing the work, but that's on them, not you.