Always keep to the left hand lane and do not change lanes unless you need to. To do a lane change, you must plan and prepare in good time. Don’t change lanes unless you really need to. Using the mirrors well before your lane change is vitally important to gather information about the traffic in the lanes around you. Check and recheck to confirm there is space for you to make this move. Put your signal on in good time to allow for it to be seen by other vehicles. The sooner you indicate your intentions, the sooner the other traffic can register your intended move. Always keep to the centre of your lane. Never drift over the lane lines.
Normal Driving Position
As you know, normal driving position is on the left hand side of the road, or in the left lane. This is the same for motorway driving as well. If the motorway has two lanes, then the left lane is the normal one to use, and the centre and right hand lanes are for overtaking.
Three and four lane motorways
Keep to the left lane unless there is a large number of slow moving vehicles in that lane, then you can move over to one or the other lanes. However, don’t stay in there longer than is necessary, especially if you are holding up traffic behind you. Please note that there is no such thing as a slow lane and a fast lane. All lanes carry a top speed limit of 70 mph unless stated otherwise. Whatever the number of lanes, the one of the right of you is the overtaking lane, whether this is lane 2, lane 3 or lane 4.
A motorway on a steep hill may have an extra lane called a crawler or climbing lane usually on the left side. This lane is used for heavy goods and commercial vehicles, buses, coaches and anything towing a trailer. These vehicles are not allowed in the right hand lane, on a three or four lane motorway, unless some lanes are closed. As the name suggests these vehicles lose a lot of speed as they haul themselves up the hill, and so would be seen crawling along. They have been segregated to allow the rest of the traffic on the motorway to run more freely and at higher speeds. [av_image src='http://tips.drivingtestsuccess.com/wp-content/uploads/2015/01/car-theory...' attachment='13537' attachment_size='full' align='center' animation='no-animation' link='manually,http://www.drivingtestsuccess.com/products/driving-test-success-learner-...' target='' styling='no-styling' caption='' font_size='' appearance=''][/av_image]