iSPECIAL ROADS null (FALSE) 0 i null (FALSE) 0 i2024-06-20 null (FALSE) 0 i null (FALSE) 0 iSometimes I've seen signs on dual carriageways and motorways that seem to null (FALSE) 0 ispecify a speed limit that's the same as the national speed limit (i.e. 60 or null (FALSE) 0 i70 mph for most vehicles, depending on the type of road), which seem a bit... null (FALSE) 0 ipointless? Today I learned why they're there, and figured I'd share with you! null (FALSE) 0 i null (FALSE) 0 IGoogle Street View photo from the A1 East of Edinburgh, showing a blue "No motor cycles under 50cc, moped,s invalid carriages and animals" sign alongside a 70mph sign. /2024/06/a1-special-road.jpg danq.me 70 i null (FALSE) 0 iTo get there, we need a history lesson. null (FALSE) 0 i null (FALSE) 0 iAs early as the 1930s, it was becoming clear that Britain might one day need a null (FALSE) 0 inetwork of high-speed, motor-vehicle-only roads: motorways. The first null (FALSE) 0 iexperimental part of this network would be the Preston By-pass (The Preston null (FALSE) 0 iBy-pass lives on, broadly speaking, as the M6 junctions 29 through 32.). null (FALSE) 0 i null (FALSE) 0 IMonochome photograph showing construction of bridge support pillars. /2024/06/Preston_bypass_construction_11.jpg danq.me 70 i null (FALSE) 0 iConstruction wouldn't actually begin until the 1950s, and it wasn't just the null (FALSE) 0 iSecond World War that got in the way: there was a legislative challenge too. null (FALSE) 0 i null (FALSE) 0 iWhen the Preston By-pass was first conceived, there was no legal recognition null (FALSE) 0 ifor roads that restricted the types of traffic that were permitted to drive on null (FALSE) 0 ithem. If a public highway were built, it would have to allow pedestrians, null (FALSE) 0 icyclists, and equestrians, which would doubtless undermine the point of the null (FALSE) 0 iexercise! Before it could be built, the government needed to pass the Special null (FALSE) 0 iRoads Act 1949, which enabled the designation of public roads as "special null (FALSE) 0 iroads", to which entry could be limited to certain classes of vehicles null (FALSE) 0 i(There's little to stop a local authority using the powers of the Special null (FALSE) 0 iRoads Act and its successors to declare a special road accessible to some null (FALSE) 0 istrange and exotic permutation of vehicle classes if they really wanted: e.g. null (FALSE) 0 ia road could be designated for cyclists and horses but forbidden to motor null (FALSE) 0 ivehicles and pedestrians, for example! (I'm moderately confident this has null (FALSE) 0 inever happened.)). null (FALSE) 0 i null (FALSE) 0 IMonochrome photograph showing a sign at the entrance to the Preston By-pass, reading: 'Motorway. NO L-drivers, mopeds, motorcycles under 50cc., invalid-carriages, pedal-cycles, pedestrians, animals'. /2024/06/preston-bypass-sign.jpg danq.me 70 i null (FALSE) 0 iIf you don't check your sources carefully when you research the history of null (FALSE) 0 ispecial roads, you might be taken in by articles that state that special roads null (FALSE) 0 iare "now known as motorways", which isn't quite true. All motorways are null (FALSE) 0 ispecial roads, by definition, but not all special roads are motorways. null (FALSE) 0 i null (FALSE) 0 iThere's maybe a dozen or more non-motorway special roads, based on research by null (FALSE) 0 iPathetic Motorways (whose site was amazingly informative on this entire null (FALSE) 0 isubject). They tend to be used in places where something is like a motorway, null (FALSE) 0 ibut can't quite be a motorway. In Manchester, a couple of the A57(M)'s null (FALSE) 0 isliproads have pedestrian crossings and so have to be designated special roads null (FALSE) 0 irather than motorways, for example (There's a statutory instrument that makes null (FALSE) 0 ithose Mancunian sliproads possible, if you're having trouble getting to sleep null (FALSE) 0 ion a night and need some incredibly dry reading.). null (FALSE) 0 i null (FALSE) 0 I1968 Manchester City Council planning document showing their proposed new special roads. /2024/06/uksi_20060398_en_001.png danq.me 70 i null (FALSE) 0 iNow we know what special roads are, that we might find them all over the null (FALSE) 0 iplace, and that they can superficially look like motorways, let's talk about null (FALSE) 0 ispeed limits. null (FALSE) 0 i null (FALSE) 0 iThe Road Traffic Act 1934 introduced the concept of a 30mph "national speed null (FALSE) 0 ilimit" in built-up areas, which is still in force today. But outside of urban null (FALSE) 0 iareas there was no speed limit. Perhaps there didn't need to be, while cars null (FALSE) 0 iwere still relatively slow, but automobiles became increasingly powerful. The null (FALSE) 0 ifastest speed ever legally achieved on a British motorway came in 1964 during null (FALSE) 0 ia test by AC Cars, when driver Jack Sears reached 185mph. null (FALSE) 0 i null (FALSE) 0 ICyclists alongside a 'motorway' river bridge lane. /2024/06/severn-bridge-cyclists.jpg danq.me 70 i null (FALSE) 0 iIn the late 1960s an experiment was run in setting a speed limit on motorways null (FALSE) 0 iof 70mph. Then the experiment was extended. Then the regulation was made null (FALSE) 0 ipermanent. null (FALSE) 0 i null (FALSE) 0 iThere've been changes since then, e.g. to prohibit HGVs from going faster than null (FALSE) 0 i60mph, but fundamentally this is where Britain's national speed limit on null (FALSE) 0 imotorways comes from. null (FALSE) 0 i null (FALSE) 0 IThe Motorways Traffic (Speed Limit) (England) Regulations 1967, highlighting "3. No person shall drive a motor vehicle on a motorway at a speed greater than 70 miles per hour". /2024/06/motorway-speed-limit.png danq.me 70 i null (FALSE) 0 iYou've probably spotted the quirk already. When "special roads" were created, null (FALSE) 0 ithey didn't have a speed limit. Some "special roads" were categorised as null (FALSE) 0 i"motorways", and "motorways" later had a speed limit imposed. But there are null (FALSE) 0 istill a few non-motorway "special roads"! null (FALSE) 0 i null (FALSE) 0 iPutting a national speed limit sign on a special road would be meaningless, null (FALSE) 0 ibecause these roads have no centrally-legislated speed limit. So they need a null (FALSE) 0 ispeed limit sign, even if that sign, confusingly, might specify a speed limit null (FALSE) 0 ithat matches what you'd have expected on such a road (An interesting null (FALSE) 0 iside-effect of these roads might be that speed restrictions based on the class null (FALSE) 0 iof your vehicle and the type of road, e.g. 60mph for lorries on motorways, null (FALSE) 0 imight not be enforceable on special roads. If you wanna try driving your lorry null (FALSE) 0 iat 70mph on a motorway-like special road with "70" signs, though, you should null (FALSE) 0 ido your own research first; don't rely on some idiot from the Internet. I Am null (FALSE) 0 iNot A Lawyer etc. etc.). That's the (usual) reason why you sometimes see these null (FALSE) 0 isurprising signs. null (FALSE) 0 i null (FALSE) 0 iAs to why this kind of road are much more-common in Scotland and Wales than null (FALSE) 0 ithey are anywhere else in the UK: that's a much deeper-dive that I'll leave as null (FALSE) 0 ian exercise for the reader. null (FALSE) 0 i null (FALSE) 0 iLINKS null (FALSE) 0 i null (FALSE) 0 hNational speed limit URL:https://www.gov.uk/speed-limits (FALSE) 0 hSpecial Roads Act 1949 URL:https://www.legislation.gov.uk/ukpga/1949/32/contents/enacted (FALSE) 0 hBased on research by Pathetic Motorways URL:https://pathetic.org.uk/features/special_roads/roads/ (FALSE) 0 hA statutory instrument that makes those Mancunian sliproads possible URL:https://www.legislation.gov.uk/uksi/2006/398/made (FALSE) 0 hRoad Traffic Act 1934 URL:https://www.legislation.gov.uk/ukpga/Geo5/24-25/50/contents/enacted (FALSE) 0 hDuring a test by AC Cars URL:https://www.autocar.co.uk/car-news/motorsport/day-jack-sears-hit-185mph-m1-motorway (FALSE) 0 .