Talk:Cloverleaf interchange

Untitled
How can I place the image of the At Grade cloverleaf properly... what copyright tag do I use??? Route 82 02:35, 12 June 2006 (UTC)

Plural?
The article seems uncertain what the plural is. Both "cloverleafs" and "cloverleaves" have been used. Choose one and use it consistently throughout. &mdash; Paul G 07:00, 28 May 2007 (UTC)


 * I have standardized the plural spelling on "cloverleafs" - please continue using this spelling in the future, everyone --Random832 01:05, 9 September 2007 (UTC)

Error
I've corrected the detail regarding cloverleaf interchanges in the UK. There were three originally, one in Redditch (mentioned), and two in Livingston, Scotland. One of the Livingston examples has been replaced with a more conventional partial cloverleaf as part of a bus route system.

Bryn666 (talk) 21:32, 16 January 2008 (UTC)

Possible European bias?
Humm - interesting article, and I hate to accuse it of any bias (it is well written) - but it seems a tad skimpy on their history and popularity in the USA. Here in the USA, they're very popular, despite the drawbacks. Go on any highway in the USA, and you'll encounter dozens of diamonds and cloverleafs. I understand that in Europe, that may not be the case, but I don't think this is an article only about Europe. It's nice that the History section provides a lot of specific instances, but perhaps either the overview or the history should be expanded, adding a bit more detail on their general history? In addition, I think the statement that "They were used for over 40 years . . ." is inaccurate, as they are still used, and "were" implies they are no longer popular, which is certainly not the case in the USA. As far as I can tell, cloverleafs are still very popular on our interstate system, and I have witnessed construction of new cloverleafs within the past few years. They're not declining in popularity, because the only reasonable replacement to handle the traffic of two highways intersecting is the large and expensive stack interchange. Most of the other alternatives can handle large volumes of traffic in only one direction. —CobraA1 19:00, 2 January 2009 (UTC)


 * Updated the wording a bit but additional updates may still be needed. ~David Craft (talk) 04:12, 28 August 2009 (UTC)


 * Not just in the USA, there are quite a few in South Africa too. Another thing that may need mentiontioning is the upgrading of cloverleaves with one or more of the loops replaced with semi-directional flyovers (or their building in this way from scratch). For example the Flying Saucer Interchange between the N1 and R21 in Pretoria, because of the alignments of the two freeways carries much more traffic on the northbound R21 to Northbound N1 and southbound N1 to southbound R21, and so the loop that carried traffic from the R21 north to the N1 north was replaced recently with a semi-directional flyover. http://maps.google.co.uk/maps?f=q&source=s_q&hl=en&geocode=&q=pretoria&sll=53.800651,-4.064941&sspn=18.514185,39.506836&ie=UTF8&hq=&hnear=Pretoria,+Gauteng,+South+Africa&ll=-25.829793,28.24379&spn=0.013732,0.01929&t=k&z=16
 * Some others are the interchange between the Ben Schoeman Highway and the Danie Joubert Freeway: http://maps.google.co.uk/maps?f=q&source=s_q&hl=en&geocode=&q=pretoria&sll=53.800651,-4.064941&sspn=18.514185,39.506836&ie=UTF8&hq=&hnear=Pretoria,+Gauteng,+South+Africa&ll=-25.878435,28.169675&spn=0.013804,0.01929&t=k&z=16
 * The Buccleuch Interchange has two cloverleaf-loops and two semi-directional ramps http://maps.google.co.uk/maps?f=q&source=s_q&hl=en&geocode=&q=pretoria&sll=-33.890937,18.528442&sspn=1.630148,2.469177&ie=UTF8&hq=&hnear=Pretoria,+Gauteng,+South+Africa&ll=-26.047722,28.097212&spn=0.013707,0.01929&t=k&z=16
 * And the N2/R300 interchange has one loop for the least-used direction (eastbound N2 to westbound R300) N2/R300 interchange —Preceding unsigned comment added by 82.32.72.129 (talk) 18:30, 1 October 2010 (UTC)

Yes, the cloverleaf interchange is still frequent in the U.S. where freeways intersect and traffic is not too heavy, i.e. outside of major metro areas. No, the stack interchange is not the only replacement interchange that can handle larger amounts of traffic (for intersecting freeways) - see for example the turbine interchange. But for any of the alternatives, overpass (flyover, bridge) costs will be 3 times as much, or more. This includes the collector/distributor version of the cloverleaf. --66.41.154.0 (talk) 16:47, 3 September 2014 (UTC)

Image
This clear and concise image should be usable; it originated from a government source (North Carolina Dept. of Transportation). Photo: - Description: Highway interchange in North Carolina - Photo: NCDOT. This image is from: The Human Flower Project - Looking over a concrete clover ~Eric F 74.60.29.141 (talk) 16:07, 13 October 2012 (UTC)


 * This show a cloverleaf with separated lanes for weaving traffic. It's useful. --Hans Haase (talk) 07:21, 15 May 2014 (UTC)

Performance and capacity is missing

 * the cloverleaf interchange ist beeing compared to other interchange types with no free flowing traffic, focussed on weaving traffic against WP:POV.
 * theres no focus on issues like performace and safety of
 * free flowing traffic
 * weaving traffic
 * usage of the cloverleaf interchange worldwide --Hans Haase (talk) 07:31, 15 May 2014 (UTC)

Self-reference: cloverstack
The article mentions, and links to, cloverstack interchange as alternative configuration, but cloverstack interchange gets redirected to this same article. — Preceding unsigned comment added by 108.234.224.230 (talk) 08:02, 10 November 2014 (UTC)