motorways in london

M8 replaces A8; M9 replaces (the southern part of) A9; M74 replaces A74; M80 replaces A80, twice. The reason is simple: forget the 'clockwise' rule for a moment and instead think of it this way. Below is a list of plans that were not built (not exhaustive): A motorway can enter zones with a number higher than its first digit but not lower. Hence the M56 and M23 follow their counterparts A56 and A23 closely, while the M69 and M53 actually relieve the A47 and A41 respectively. They just don't have a motorway number.Initially they were intended as short motorway bypasses of sections of A-road, and when they were connected by other lengths of motorway, they were to assume a full M-number.

Hence the London to Birmingham motorway is M40; the M25 proceeds clockwise around London from a start point just south of the Thames at Dartford and is therefore a zone 2 route.The allocation of these numbers is not according to any overall plan; wherever possible they have been assigned to mimic a nearby A-road but this is not always the case and there is no requirement to do this. The spur then takes the cumbersome number; hence the A48(M) and its parent motorway M4 bypass a section of A48 between Cardiff and Newport.The name "Mancunian Way" might be a mouthful, but it has fewer syllables than "A57(M)"Usually the corresponding A-road will vanish where such a road has been created. M25 - this is the 117-mile motorway that almost forms a complete circle around Greater London. It turns out they're multiplying... if you know where to look!In this first Imperfectly Odd outing, we take a trip to northern Lancashire to see one of the most peculiar motorways in the UK, and one with the strangest history.Wide ranging changes to London's Congestion Charge take effect this week. Which Roman road ran from Dover, via London, to Wroxeter, in Shropshire? It can be explained in three steps, including the whole process of selecting a route and constructing the road, which is quite impressive. The western half of the M4 is in zone 5. It doesn't form a very effective zone boundary at all, but no matter because the boundary between zones 1 and 2 is, again, the Thames estuary and the M2 has no particular numbering significance. There is also some doubt about whether the M3 forms the zone boundary all the way to Southampton, or whether the 3/4 zone boundary takes an arbitrary line south-west from somewhere around Basingstoke.There are two further routes, dividing what would otherwise be an extraordinarily large zone 4 into smaller pieces:This is where you might need to take a couple of aspirin. Once these routes were connected it's a fairly safe bet that they would have become a continuous route and the whole thing would have been given one number.The question is - given that motorways are expected to travel clockwise around the hub-and-spoke system, which zone would this motorway take its number from? The M90 motorway, Britain's northenmost motorway, runs from Edinburgh to which city on the River Tay? The M73 takes its number from an A-road that lies some way away and which performs a completely different function. And zone 4 is a landlocked island, quite unlike any other zone. )So from chaos to simplicity: the Scottish motorway numbering system is a piece of cake. Hence the first four routes run: M1 London to Leeds (then A1 as zone boundary to the Scottish border) M2 Medway Towns Bypass Note that while one numbering scheme is used for Great Britain, roads in Northern Ireland are allocated their own numbers on an ad hoc basis. So, if you're ready, this is all you need to do:Yes, honestly, it's as simple as that. The M20 has been voted England's worst motorway - while the M11 is the motorists' favourite. It solves the often-asked question about why there is no M7: it's because there has never been a need to replace the A7 with a motorway.There are two little dark clouds on our otherwise clear blue horizon. Roads which used to be motorways but have been downgraded: There is also no geographical or chronological system: from south to north the zone 5 routes are M50, M54, M56, M53, M57, M58, M55; the last zone 6 number to be allocated was M60. This list may not reflect recent changes . In addition, the proposal to put a tunnel under the River Thames to the east of Dartford Crossing and the revived Birmingham Western Orbital plans are both described as motorways.There have been many plans for motorways in the UK that have not been built. (The answer is at the bottom if you need it - no peeking please. So A20(M) ate its vegetables, grew up to be big and strong and now goes by the name M20. This creates some interesting situations.

M4 - the M4 motorway starts in west London, and provides a route to the west of the UK, past Heathrow Airport and towards Reading and Bristol - and then into Wales. There is literally no system to determine which number a road should get within a given zone.The twisted logic of motorway zones in England and Wales is bad enough as it is.

The London orbital motorway, numbered clockwise from Dartford around … It's all rather Biblical: The astute reader will already have seen the problem coming at us. The idea was stretched to include spurs of motorways where the spur and the motorway together form a bypass of a section of A-road. Note that the numbering scheme used for Great Britain does not include roads in Northern Ireland, which are allocated numbers on an ad hoc basis. This page documents it in detail.Original text, photographs and graphics © 2001-2020 Chris Marshall, except where stated. The way it works is, quite honestly, cheating: the M4 and M5 both cease to be zone boundaries after they cross. Pages in category "Motorways in London" The following 4 pages are in this category, out of 4 total. List of motorways in the United Kingdom is a complete list of motorways in the United Kingdom.

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