I hear ya. House is close to road. One night I was to lazy, and let the dog outside to do his thing. Chased something onto road and was struck by small car ( full size lab ). Thankfully driver was not injured. I paid 100%. Didn't equal guilt/sorrow I had for being responsible for dog. Another...
Again, sorry for the loss, livestock on a public road...that's all the court will want to know. Been there done that ( neighbors horse got loose.....I can tell you exactly how that turned out with police report & who was responsible for damages).
Knowing that you your chickens are getting onto the road? Really?
Sorry but you are asking for a bad result. Imagine if they swerve to miss the chicken.
I don't care if the speed limit is 20mph. No excuse. Roads are not free range areas.
Sorry for your loss. I have seen damage to cheap fenders from smaller birds such as pheasants & grouse. Much more damage if they are little higher and hit plastic grill and cheap radiator & mounts.
Even my heavy duty took about $2,000 ( 10 yrs ago ) from a hen turkey ( yep bigger bird ).
No...