That depends on who was in the lane of travel, and who was in the merge lane. The merge lane is the one required to yield to the travel lane. If the vehicle in the merge lane failed to yield the right-of-way, that'll definitely be a factor.
However, other factors may apply, as well. Motorists have a bad tendency to want to suddenly speed up and pass a merging vehicle when they see a turn signal. Excessive speed/reckless driving on the part of one or both drivers will play a factor in determining fault, as well. In short, one would have to know all the details of the situation you described in order to determine whose at fault.
Changing lane should be at fault because the driver should be able to control the car against hitting another car. The changing lane driver only has a case if it is illegal to use the side road.
The driver in the lane that is not blocked. The other driver must wait for a clear lane before proceeding.
Sorry but you are at fault.
It is always the fault of the person entering into traffic when an accident occurs.
The insurance will see it as your fault because you lost control first, the other driver probably didn't have time to react.
This depends upon where you were struck exactly. Did they hit you on the rear end, side, or front? Damages tell alot about an accident and the fault determination. If you were rear-ended on the ramp then the other party is generally 100% at fault, unless you were negligent and stopped very suddenly instead of continuing with the flow of traffic. This should be discussed with police and your insurer in this case. I may be reading the question wrong, but I think you mean one vehicle was entering the highway from the onramp and the other was already on the highway. In this case, there is (almost) no doubt that the merging driver is at fault.
Park Lane Road in London, EnglandPark Lane Road in London, EnglandPark Lane Road in London, EnglandPark Lane Road in London, EnglandPark Lane Road in London, England
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The car pulling from the parking space is at fault
If this is a 2 lane road, then the vehicle the went around would be at fault since it went out of it's lane and attempted to pass on the right.
It depends on the State, but most will require that the blame be shared, then you get to fix your own.
The person who rear-ended the stalled car is at fault. As a driver you are always required to be able to stop your car for the most unexpected situation. This means that if you need to slow down going around a corner because you never know what might be in the middle of the road then that is what you do.