Driving in the UK is governed by various legal powers and in some cases is focus to the passing of a driving test. The administration
produces a Highway Code that details the requirements for all path users, including drivers.
Unlike mainly countries in the world, UK traffic drives on the left.
British roads are limited for mainly vehicles by the National Speed Limit. Road signs in the UK use imperial units, so speed limits are posted in miles for each hour. Speed confines are the maximum speed at which certain drivers
may legally drive on a road rather than a defined proper speed, and in some cases the nature of a road may dictate that one must drive significantly more slowly than the speed limit may allow. This restricts some vehicles by default to a speed of 30 mph in built up area, and several light vehicles to 60 mph on single carriageways and 70 mph on dual carriageways and motorways, with several large vehicles or some of those towing trailers subject to reduced limits on some roads depending on the category of both road and vehicle.
Sections of road subject to the national or in-town speed limit only need limit marker signs at the start of a section, without repeaters, provided street lights are or are not present as suitable. Speed limits of 20 mph, 30 mph, 40 mph, 50 mph and 60 mph are also used on roads in the UK where it is deemed that the national or in-town speed boundary is inappropriate, with repeater signs posted at regular intervals.
Drivers on dual carriageways are usually expected to use the left-most lane unless overtaking other vehicles on the path, unless signs or road markings indicate that the left-most lane(s) is only for traffic leaving at the next junction.
Drivers who desire to overtake a slower vehicle are thus expected to move out from their lane, pass the slower van and return to the left-most way. This enables faster traffic to overtake unhindered if it wishes to do so. On the UK's busiest transportation, where there may be four or more lanes in each direction, there is often a situation where overtaking becomes repeated as each successive lane moves at a slightly faster speed than that to its left.
Driving licenses may be obtained by any UK resident over the age of 17, subject to certain conditions. Initially, a provisional license is issued, which restricts the holder to driving whilst accompanied by a driver who is at least 21 years old, who has held a full license in the category of vehicle they are supervising the learner driver in for at least three years, and does not permit the provisional license holder to drive on motorways. The provisional license may be exchanged for a full license after the holder has passed the United Kingdom driving test. On reaching the age of 70, drivers can apply to have their licenses renewed with their doctors' permission.