Talk:Dual carriageway
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A few points about UK dual carriageways:
A "dual carriageway" is by definition not a motorway. "Dual carriageway ahead" has a specific meaning and is not inclusive of a motorway (for which different laws apply). After discussion here I will update the article to reflect this.
What is a "grade-separated junction" ? I had previously assumed this was a US thing, but after the recent edits in the UK section I am wondering if they exist in the UK too?Mat-C 01:19, 28 Jun 2004 (UTC)
- The UK Highways Agency web site has the answers (not necessarily the correct ones, I admit) to both your points. First, it lists (here) two types of dual carriageways: "motorways", and "all purpose trunk roads".
- Second, see the agency's descriptions of numerous road projects, such as "A1 Peterborough to Blyth Grade Separated Junctions". (I would have put a hyphen between 'Grade' and 'Separated', myself.) -- Heron 10:47, 28 Jun 2004 (UTC)
- A motorway is - by definition - a dual carriageway! The term 'dual carriageway' purely applies as a description of having the lanes of traffic in alternate directions separated by a barrier or a strip of land, it doesn't imply anything about the level (A-road/B-road/C-road/Motorway/etc) of the road directly. This is a common error of understanding that grew up when they first started appearing on major roads only. Speed limits which apply for 'dual carriageway only' actually apply for 'dial carriageway of this road classification' only. A good example of this is the very many dual carriageways we now have in towns and cities; you really cannot speed down them at 70mph (cars) /60mph (trucks) no matter what you feel like doing!
- 'Grade-separated' is the technical term for where the major road and the other roads it joins are 'separated' by a 'grade' (as in 'gradient'). Alternate phrases include 'slip-road to roundabout/junction at higher/lower level', etc. but it is a clearer phrase and much shorter! --VampWillow 10:51, 28 Jun 2004 (UTC)
- A motorway is not "by definition - a dual carriageway!". I refer you yo the A38M in Birmingham which was designed and opened ~1973 with no physical duality of carriageways, relying instead on traffic lights to control what was to be a tidal flow across many of its (I think) 7 lanes. It was a Motorway. The experiment was not a success Fiddle Faddle 23:10, 29 May 2006 (UTC)
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- Have clarified the points above into article. ps. I agree about the hyphen thing but it seems officially it doesn't exist! --VampWillow 11:00, 28 Jun 2004 (UTC)
- Are pedestrians and cyclists permitted on dual carriageways with grade-seperated junctions?
--User:Emanuel 15:51, 28 April 2006
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- Yes. There are often special lanes for cyclists to allow them to cross the slip roads at right-angles, if they dare. Motorways are the only roads that always exclude peds and cyclists. --Heron 17:18, 28 April 2006 (UTC)
[edit] Australia
With Australia can you provide more images of Sydney Motorway Network and the Hume and the Pacific Highways? You currently only show Melbourne! —Preceding unsigned comment added by 58.168.57.62 (talk) 07:09, 21 May 2007 (UTC)
[edit] Switzerland
There was a short entry regarding Switzerland. It was completely wrong! Hence I removed it. (Many autostrasse are NOT dual carriageway in CH, a few are, but a motorway is called autobahn.) You are welcome to restore a corrected (and verified) entry, but please also remember notability issues - an entry on Germany would be certainly more relevant. —Preceding unsigned comment added by Tang Wenlong (talk • contribs) 00:02, 29 February 2008 (UTC)
