If you are a normal car you should use the middle lane unless you are turning of.
It depends on which country you are in. Countries may drive on the left or right carriageway and local rules may apply to lanes.
Slower moving traffic.
Usually for slower vehicles.
Drivers from either direction may use the center lane for left turns.
When driving on a four lane highway or freeway you should use the right hand land or 'thru lane' except when passing. If the right hand lane is designated for slower traffic or for exiting traffic, you'd use the lane to the left of it.
If on a roadway where traffic is flowing only in one direction, you should use at least three to the rear of the vehicle. If on a two-lane road, at least three in each direction.
ok well you have got four colours of reflecting studs. Green, Red, White, Amber.Green are on the slip loads. Red are on hard shoulder. white between lanes and Amber at central reservation.White are easy to remember as they are like on normal roads.Red is an emergency colour. the hard shoulder is only used in an emergency.green is go. so to go somewhere off the motorway you would use the slip road.
M4
A Motorway is the nearest equivalent. A Motorway has to have six lanes (usually), a speed limit of 70mph, an empty lane on either side for cars that have to stop (called the "Hard Shoulder") and no flat junctions except at the start and finish. A "Dual Carriageway" is a road with four lanes and a speed limit of 60mph, usually with some flat junctions and no hard shoulder.
I should think that driving in cities would use less petrol per year because one mostly drives such shorter distances. Still, the speedier motorway driving has the engine turning over very much closer to its peak power rpm's - the autocar will see much better petrol efficiency near the peak power point, so one would use less petrol per mile on the motorway.
No, you do not initiate a right turn from a parking lane. Parking lanes are not intended to be used as traffic lanes. To initiate a right turn, you should be in the farthest right traffic lane.
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.
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.
Not always, you can, if nobody is there, you can use the other direction lane.
On narrow roads, a turn out lane creates an area where slower traffic can pull over to allow other vehicles to pass. They are used where the nature of the road precludes safely passing in the opposite lane. You should use the turnout lane when other traffic wants to pass you.