Talk:2+1 road

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Introduction date[edit]

This concept dates back well before this introduction. In the US, this concept has existed for a lot longer. It is common in parts of the country where there are hills or very long sections of roads where passing is not allowed. This article should probably be adjusted to reflect this. While the name is Irish, the concept is not. Vegaswikian 20:00, 16 July 2006 (UTC)

I concur. I think they're called three-lane freeways but I'm not sure. A segment of California State Route 120 near Manteca used to have a three-lane configuration (with a Jersey barrier going back and forth from one side to the other of the middle lane) before it was widened to four lanes around 1995. --Coolcaesar 05:33, 29 July 2006 (UTC)
The three lane concept is not new, as there was an old concept of a shared central lane (suicide lane). Also, climbing lanes are an old and common concept. 2+1 is a far stricter class of road, take a look at the linked document to see the full extent of it.
The article as stands neither claims the invention of this class of road by the Irish (it just has extensive information on the introduction there, due my contributions), nor the invention of it by the Scandinavians (the use there is mentioned as that is where the NRA in Ireland got the idea from).
I'd be interested to know more about such roads, if they exist, in the US - but you should be careful that you are referring to the same concept, rather than just a similar one (simply a "three lane road", or a standard road with climbing lanes, is not the same thing at all).
zoney talk 18:36, 16 August 2006 (UTC)
Valid question. Maybe the issue here is do all unique types of roads need to have an article or do all roads here fit into some generic families that have similar traits? In Vegas, we have one six lane road that is two lanes eastbound, 3 westbound and a turning lane. This is simply part of the class of roads that have a different number of lanes in each direction. Here in the US the generic 2+1 roads may or may not be divided but the one with that formal name is always divided. How do we note this difference since they are both for 2 travel lanes in one direction and only one in the other. This is a part of the larger problem with roads in that they use different names around the world, some formal and some not. Vegaswikian 19:05, 16 August 2006 (UTC)
Well, I looked for somewhere to add the details of the introduction of 2+1 roads in Ireland (where they are a clear road type). This article seems like a logical place for it, particularly as the NRA have that document that clearly sets out what a 2+1 road is here in Ireland. You'll notice I added details of our "wide two lane" roads to Super two; again, because it seemed a logical location to put the information I had to hand.
zoney talk 19:20, 16 August 2006 (UTC)

Climbing lanes = 2 + 1 ?[edit]

I think there is some confusion in the article; a photo of a standard climbing lane describes the road as a "2+1". I don't think roads without a median divide are 2+1; climbing lanes have existed in Ireland for decades and were never called anything other than climbing lanes. So that is probably why "2+1" isn't used in America - they don't have them! I'll amend the article to eliminate the confusion. Sarah777 (talk) 07:34, 10 April 2009 (UTC)

I concur. The 2+1 designation refers to a specific design standard that is primarily used in Germany, Sweden and Finland. NCHRP Report 275 provides a detailed description of the 2+1 standard. (talk) 01:32, 12 January 2011 (UTC)

Dead link[edit]

During several automated bot runs the following external link was found to be unavailable. Please check if the link is in fact down and fix or remove it in that case!

--JeffGBot (talk) 04:39, 10 June 2011 (UTC)

Dead link 2[edit]

During several automated bot runs the following external link was found to be unavailable. Please check if the link is in fact down and fix or remove it in that case!

--JeffGBot (talk) 04:39, 10 June 2011 (UTC)

To be added (In case I forget)[edit]

ELSEWHERE SECTION In Tasmania, The Dilston Bypass - A section of the East Tamar Highway has 2+1 config[1] and a section of 2+1 config is currently (Sept12) under construction on the Midland Highway, close to Symmons Plains Raceway.[2]


The given Google Streetview reference for the Australian Pacific Highway shows a dual carriageway section, not a 2+1 road! .. Guidod (talk) 11:24, 13 April 2014 (UTC)

I have looked for a section (may be the link in the article was mistyped) but so far I have only met a three lane section in an urban area, limited to 80, no switchover anywhere, so it doesn't fit the category of a 2+1 road system, it looks more to be unintentionally left there for further construction. See at StreetView loc: -32.5736,152.13 Guidod (talk) 11:39, 13 April 2014 (UTC)
There is a mix of dual carriageway and single carriageway sections around here. For example, on the outskirts of Port Macquarie is still single carriageway with a 2+1 layout. Glenkoorey (talk) 10:43, 13 September 2015 (UTC)
Just from looking at Google Maps + Streetview, I did not find any section. Any valid geo coordinates that could be checked? Guidod (talk) 01:33, 14 September 2015 (UTC)