Assuming you are in the correct lane, beep the warning horn a lot. If they still don't move, you should steer away from their line of travel and away from the centreline if possible. If you cannot, then hit the brakes as hard as possible. Do not do both; if you try to brake and turn at the same time, the brakes will probably lock up and you will lose control of the vehicle.
no
A quick flash of the headlights helps. Whatever you do, don't dodge into their lane, because that is where they will be going.
What you should do is nothing. Maintain your speed, don't change lanes, and just let them pass, same as you would do if you were being passed by a car.
If you are riding on a motorcycle, you should be paying attention to the car in front of you. If you look at your GPS, you could crash into the car or something else.
In order to safely pass a vehicle at any speed, you need to have plenty of room to get around the slower vehicle. You shouldn't pass on a curve or a hill, and you should never pass a motorcycle in the same lane the motorcycle is driving in.
Under normal conditions a safe following distance between your car and a motorcycle should be?
The car that crashes into the car from behind is the one at fault. The police should be called and the decision should be theirs.
3 feet
They should not be driving in the bus lane to start with bus lane means bus lane end of story.
It depends on the local laws for what portion of a traffic lane does a motorcycle need to operate safely. Some areas require as much room as a car, while other areas allow motorcycles to go wherever they fit on the roads.
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.
Pass a motorcycle the same way you would pass a car. If you are passing on a curve just remember that motorcycles can take turns faster than a car and that many take the shortest line through a curve.