If "Car A" is parallel parking, it has the right of way over "Car B". If the parallel park was indicated properly by "CAR A", then "Car B" should not have been in a position to pull into space behind "CAR A" as "CAR B" should have hung back as soon as the paralell park was indicated by "CAR A".
It is your fault.
It would be the car who has driven past, then reversed into you.
You are.
Backing up--it is your fault.
The person who ran into you from behind of course because they should be stopping, or slowing down when you turn in the parking lot.
The car that is in motion is ALWAYS at fault.
If you were both backing out at the same time, then it will be considered joint fault, sometimes called contributory negligence. That means both drivers failed to notice the other driver.
Answering "Pulling out of a parking lot onto a street and you have to back up to avoid on coming car and the car behind you hits you who is at fault?"
both of you for not looking back
the car that back into the other car
If you strike him - you are at fault. He can be charged with the No Parking violation but YOU are charged with the collision.
This depends on the situation, but if you were stationary, not moving and he hit you, he would be at fault. In most cases if the other motorist hits you from behind it is his fault, as you must maintain full control of your vehicle at all times, and if he hit you from behind, that was not the case.