On a dual carraigeway with National Speed limit signs (a white circle with a diagonal black stripe) the limit for cars and commercial vehicles up to 7.5 Tonnes is 70 mph. There are lots of conditions that apply to this statement, so don't expect this answer to cover all possibilities.
The national speed limit (currently 70mph) applies to a highway defined as a Dual Carriageway.
If it is classed as a dual carriageway then a central barrier of some kind (even just natural habitation as opposed to a crash barrier/fence) will be present although not necessarily along the full length.
60
They don't ! Maximum speed on a dual carriageway is 60mph - Motorways is 70mph.
This is a Ditloid. The answer is, 70 = National Speed Limit on a Dual Carriageway.
Unless specifically stated by a sign, the speed limits for cars are: Motorway: 70 MPH Dual Carriageway: 70 MPH Single Carriageway: 60 MPH Built up areas: 30 MPH (in towns, villages etc) Other vehicle types such as trucks and buses have their own speed limits.
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.
A dual carriageway will probably have traffic lights, roundabouts and other road features similar to normal roads so cannot be a motorway. Also, a motorway has to have a hard shoulder as well.
Poole is a massive city on the south coast but has no motorway! There are a few short stretches of dual carriageway and loads of speed cameras. The nearest motorway is the M27 in Southampton.
mid 80's
In the UK, unless otherwise indicated it is 50 mph
The set standard lane width for dual carriageways and motorways is 3.65 metres. The set standard width for hard shoulders is 3.3 metres.
No it is not, however York is quickly accessed by the A64 Dual carriageway Fromm J44 of the A1(M). The first exit for York is 13 miles from the A1(M)
The M2 Motorway in Kent, England, is only 25.7 miles long (41.4km). It is extended by the A2 dual carriageway at either end which makes the road longer.
too many crashes . When I was young, there was only the 30mph limit in towns, and a few 40mph limits on urban through ways. Apart from that, no limit on the open road. Now we have 70mph on motorways and dual carriageways, 60mph on all other roads unless lower limit posted. Lower limits are a sometimes confusing mix of 50mph, 40mph, 30mph, 20mph and 10mph