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Old October 20th, 2016, 04:53 PM   #41
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It says at the bottom "No qualifying interchanges in Cyprus, Liechtenstein*, Malta or Slovenia".
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Old October 20th, 2016, 09:19 PM   #42
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Quote:
Originally Posted by Ryme Intrinseca View Post
I have now completed Norway and Switzerland, so I can present the 'EU and EFTA' table of results:



One qualifying interchange in Norway is somewhat disappointing.

Switzerland does better, though with an unusual proportion of offside entries and exits - you will not find the likes of this in the design manual!
You have missed two cloverleafs in Croatia.

Cloverleafs:

1. Sveta Helena (A4-D10-D28): https://goo.gl/maps/2tDaafbZgrx
2. Sredanci (A4-A5): https://goo.gl/maps/SZJZfTQPXuM2
3. Kosnica (A3): https://goo.gl/maps/a5Q2i1MKmm82
4. Jakuševec (A3-A11): https://goo.gl/maps/kjWhEio9RC32 (fully constructed, nothern connector road in planning)
5. Velika Gorica-jug (A11-D31): https://goo.gl/maps/NN5G3hKiwYB2
6. Zaprešić (A2-D1-D225): https://goo.gl/maps/yDEpRgq68xx
7. Kanfanar (A8-A9-D303): https://goo.gl/maps/ajpn1vT1KoD2
8. Pula (A9-D66): https://goo.gl/maps/ZMbM21ZBMUC2
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Old October 20th, 2016, 11:27 PM   #43
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2 and 4 are not 'full access freeflow interchanges' as they each have no vehicular access in one direction. So the count of six cloverleafs is correct according to the stated criteria.

Last edited by Ryme Intrinseca; October 21st, 2016 at 10:54 AM.
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Old October 21st, 2016, 09:16 PM   #44
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Quote:
Originally Posted by Ryme Intrinseca View Post
2 and 4 are not 'full access freeflow interchanges' as they each have no vehicular access in one direction. So the count of six cloverleafs is correct according to the stated criteria.
4 yes, but 2 (Sredanci) has become full access: http://www.openstreetmap.org/#map=15/45.1336/18.3119.

Further proof: http://hac.hr/hr/cestarina/cjenik/zagreb-lipovac-osijek (look for price to ČCP Svilaj exit).

So, 7 then.
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Old October 21st, 2016, 11:36 PM   #45
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Quote:
Originally Posted by Gedeon View Post
4 yes, but 2 (Sredanci) has become full access: http://www.openstreetmap.org/#map=15/45.1336/18.3119.

Further proof: http://hac.hr/hr/cestarina/cjenik/zagreb-lipovac-osijek (look for price to ČCP Svilaj exit).

So, 7 then.
Thanks for the information. It looks like the current number is 7.

I don't plan on updating for junctions opened after I did the survey for each country. But I'm happy to make corrections for Google map errors on the survey date.

Do you know when the junction was fully opened? Presumably there will have been a press release and stories in Croatian media?

Last edited by Ryme Intrinseca; October 21st, 2016 at 11:42 PM.
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Old October 22nd, 2016, 06:02 PM   #46
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Quote:
Originally Posted by Ryme Intrinseca View Post
Thanks for the information. It looks like the current number is 7.

I don't plan on updating for junctions opened after I did the survey for each country. But I'm happy to make corrections for Google map errors on the survey date.

Do you know when the junction was fully opened? Presumably there will have been a press release and stories in Croatian media?
March 2nd 2015: http://hac-onc.hr/news/2015/03/02/in...ija-za-javnost
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Old October 22nd, 2016, 06:37 PM   #47
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Quote:
Originally Posted by Ryme Intrinseca View Post
I have now completed Norway and Switzerland, so I can present the 'EU and EFTA' table of results:



One qualifying interchange in Norway is somewhat disappointing.

Switzerland does better, though with an unusual proportion of offside entries and exits - you will not find the likes of this in the design manual!
There are a few three-way interchanges in Norway, though.
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Old October 22nd, 2016, 10:23 PM   #48
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Quote:
Originally Posted by Gedeon View Post
Fair enough, I've updated my spreadsheet accordingly. Here's the EU table with the extra Croatian cloverleaf:

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Old October 22nd, 2016, 10:26 PM   #49
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Any photo editing program (as simple as Paint) allows you to cut off the unnecessary white space at the bottom of the image
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Old October 22nd, 2016, 11:02 PM   #50
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That may be so but I don't think Paint can open Office or PDF formats. Anyway, here's the corrected EU and EFTA table:

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Old October 22nd, 2016, 11:23 PM   #51
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You can open the .png file in any photo editing program.
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Old October 23rd, 2016, 12:06 AM   #52
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Will bear that in mind
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Old November 29th, 2016, 04:23 PM   #53
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I have a couple of new tables for this data to share. The first is the table of EU and EFTA interchanges but with three new descriptive statistics: QUAL, QUAL %, and % QUAL.

QUAL refers to the total number of interchanges in the STACK, CYCLIC, 1 LOOP and CLOVERSTACK categories. This is a good measure of the number of high quality interchanges, i.e. those lacking weaving areas and offside entries/exits. QUAL % is the country's percentage of the total number of quality interchanges. QUAL SCORE is the percentage of the country's interchanges that meet the quality criteria.



The junction types in CAPS sum the data for several subtypes. The second table provides the more detailed information by subtype:



This is how I classified qualifying interchanges:

- STACK includes classic four-level stacks, stack-turbines like this, and stackmills like this.
- CYCLIC includes turbines as well as windmill/octopus-type designs.
- 1 LOOP refers to single loop designs, including those in a stack-like arrangement, those in a turbine-like arrangement, and those in a windmill-type arrangement.
- CLOVERSTACK refers to design with two loops in opposite corners, including 'cloverstack classic', 'clovercorner', partially-unrolled cloverleafs, cloverturbines, and clovermills.
- 2 LOOP refers to designs with two adjacent loops in either a stack, corner, turbine or windmill-like arrangement.
- 3 LOOP refers to triple loop designs in either a stack, corner, turbine, or windmill-type arrangement.
- CLOVERLEAF includes modified cloverleafs like this as well as classic cloverleafs.
- OTHER NEARSIDE refers to any design lacking offside entries or exits that does not fall into any of the above categories.
- OFFSIDE refers to any design with one or more offside entries and/or exits, which I define broadly to include junctions where one of the mainlines merges or diverges (e.g. this). I subdivide offside into Offside stack, Offside 1 loop, Offside cloverstack, Offside 2 loop adjacent, Offside 3 loop, Divided (i.e., both mainlines split), Gothic (i.e. mainline(s) swap over), Other offside.
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Last edited by Ryme Intrinseca; February 19th, 2017 at 08:31 PM.
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Old February 19th, 2017, 09:55 PM   #54
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A bit more detail for Germany and Spain:





I've also tightened up the clovermill and modified cloverleaf categories, which results in four interchanges being reclassified. Here's the revised EU & EFTA table:


Last edited by Ryme Intrinseca; February 20th, 2017 at 01:50 PM.
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Old February 20th, 2017, 08:11 PM   #55
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Quote:
Originally Posted by Ryme Intrinseca View Post
Kosovo 0
Looks like they recently built a cloverleaf SW of Pristina.
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Old February 21st, 2017, 12:12 AM   #56
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Not a freeflow one though
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Old February 21st, 2017, 02:02 AM   #57
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Why not? I'm talking about this one.
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Old February 21st, 2017, 10:52 AM   #58
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Ah i thought you meant this one https://www.google.co.uk/maps/@42.63...21.1502973,17z The larger one doesn't show on Google mapping (as opposed to satellite) at all. It's for this kind of reason that I've had to give up on surveying Europe outside the EU/EFTA.
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Old March 28th, 2017, 12:01 AM   #59
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With the US survey complete, I can now compare it with the EU/EFTA:





- There are 833 qualifying interchanges in the US compared to 680 interchanges in the EU/EFTA.
- The US has 2.6 qualifying interchanges per million population, versus 1.3 qualifying interchanges per million in the EU/EFTA (2016 population estimates).
- Incredibly the surveys show exactly the same number of interchanges in the cloverleaf category in the US and EU/EFTA (386)!
- The US dominates the stack category, with 94 versus a puny 8 in the EU/EFTA (note that this includes stackturbines and stackmills as well as regular stacks; see OP for details).
- US interchanges are generally to higher standard designs, with a qualscore of 22% vs. 12%. (This is the combined percentage of interchanges in the stack, cyclic, one loop, and cloverstack categories.)
- A bright spot for the EU/EFTA is more interchanges in the cyclic category (i.e. turbines and windmills), with 17 vs. 13.
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Old March 28th, 2017, 03:11 PM   #60
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Many stacks in the U.S. have only single lane connectors though. In Europe two lanes are fairly common, though I do not have any statistics of that at hand.
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