When backing up more then 30 ft. you are required to activate your hazard lights when backing up. So yes, if you are backing up 100 ft. you have to use your hazard lights.
Backing up while driving is putting your car in reverse with your foot on the brake and slowly letting your foot off the brake. If you are pulling out of a parking spot you might turn the wheel.
In most circumstances, the backing vehicle has the greater duty of care and would be found at fault.
The person driving through. If you're backing out then you do not have the right of way.
Driving schools that will teach drivers how long the blind spot on the ground is in back of a vehicle , and enforce checking around the vehicle while backing, as well as tell kids around the vehicle to keep out of the way while backing up.
The driver backing up. Unless you can prove the other car was driving unsafly.
If you're driving forward, you aren't backing out the car.
Whoever is backing up is at fault. No matter what the circumstances. Watchout!! Even if you are involved in a collision with an unlicensed driver who is driving recklessly, if you are backing up it will still be YOUR FAULT ! The question will answer itself if you didn't try to force the wording so much: Don't you think who is at fault "...when you back into the side of some one...." seems pretty clear?
only if you shift into reverse some carts make the loud beeper to let people know they are backing up
It is the fault of the person backing out. You have the right-of-way if you are driving in a usual and safe manor. The person who hit you should be cited for "backing without caution".
The driver who is backing up. That person has created a traffic hazard/impediment and is totally responsible.
The person backing out of the lot. Cars in the travel lane have right of way.