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Five vehicles or more.
Right Lane
Drivers intending to stay on the highway/freeway should stay in the right lane or the lane designated as a through-lane. The only times you should move left is to allow vehicles to merge from a right side on ramp (and move back to the right lane as soon as you can), or to pass slower traffic already in the right lane (then move back to the right lane when it is safe to do so). If a freeway provides a "slower" lane and you drive slower than the maximum speed allowed, you should use the slower lane. But never hog the passing lane just to keep driving in it; move over and let faster traffic pass you.
you must move over to the left or merge over to the left
you must move over to the left or merge over to the left
In the USA, slow down and move to the right side of the road as soon as it is safe to do so. On a 2-lane road, move to the shoulder. Allow the emergency vehicle to proceed.
If you intend to turn right, move into the lane marked by the sign. If you do not, leave that lane.
They are generally required to be in the right lane, and only move left to pass.
I think it is A. Vehicles Should Move Slowly.
Depends on what state your in. In some states the far left lane is used primarily for Emergency Vehicles and a passing lane. In California you can travel in that lane as long as you move to the right if an Emergency Vehicle comes up behind you. According to the Florida handbook, "if the road has 4 or more lanes with two-way traffic, drive in the right lanes except when overtaking or passing." Or when you're carpooling.Overtaking and passing.When passing.When passing slower moving traffic.
Always turn in to the lane closest to you (e.g. making a right turn onto a highway you should turn into the right lane).Turning from the highway depends upon which you are going, if left turns are premitted (some require left turns from the right lane only) So you must check the rules for that particular road. Unless there are other vehicles trying to come on to the intersection then you should just simply move to the left.
Use the position of your vehicle to communicate your intentions to change lanes. Position the vehicle in the right side of your lane before turning right and move toward the center line when you are about to turn left.