Actually most states would allow deniance , if the car was parked in a no parking Zone. Parked on a side walk to allow the flow of traffic suggests Nightrider was not impeding traffic or acces. Further the pictures show that the street pavement was overlayed on the sidewalk.
Nightrider, 15% of $9K is $1350.00 I am assuming the Insuarnce company in question is from the truck line. I suggest you call on yours. Most big carriers have this in their policies, at least as an option. Worth a check out.
A good attorney, even in Norwich, would cost you less than $350 to pursuade their insurance company to do the right thing.

For the record, I am not an attorney, nor have I ever played one on TV.
Be Advised, this advice is from a stubborn old idiot who often picks fights any sensible person knows he can't win.

roadster with a stick