Smallest and largest freeflow interchanges
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Smallest and largest freeflow interchanges
I'll start off with one contender for each from Qatar:
This one Google Maps OSM link manages free-flow turns and straight-across movements in all directions but has built-up areas right up close to it, and is only about 150m across.
Whereas the new Orbital Highway has some absolutely gargantuan interchanges such as this stack interchange Google Maps OSM link, which is about 600m across at its minimum.
Re: Smallest and largest freeflow interchanges
From the westbound exit slip road leaving, to the eastbound exit slip road leaving, the two extreme points of the interchange, is a distance of 2520m, or just over 1.5 miles.
You can fit the circle of the Coventry Ring Road between those two diverges twice.
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Re: Smallest and largest freeflow interchanges
It won't be the world's largest, but it has always struck me as being 'unnecessarily large' (and confusing in the middle of the night, too!).
Italy seems to specialise in both extremes of 'sprawling interchanges' and 'unbelievably compact' ones.
Re: Smallest and largest freeflow interchanges
Big and complex.
Re: Smallest and largest freeflow interchanges
How can this count as free flowingOwain wrote: ↑Thu Jul 09, 2020 18:46 This would probably count technically as a free-flow interchange: https://www.google.co.uk/maps/place/070 ... d8.9400383
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Johnny Mo
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Re: Smallest and largest freeflow interchanges
It's in Italy.
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Re: Smallest and largest freeflow interchanges
It's also on Google Maps, which means it's a mistake! Should've referenced SABRE Maps instead!!
The thing is a massive anticlockwise gyratory which has no 'stop' or 'give way' signs/lines. In some places - possibly even all of it - the carriageway is a one-way S3. There is so little traffic that you can drive through it without meeting more than one or two other vehicles at any time of day or night. In fact the only reason for even slowing down at all is to avoid missing an exit and having to drive all the way round the thing again (I think my record was 3 laps before finding the correct turn, after discovering that the sign had fallen off its post!).
Re: Smallest and largest freeflow interchanges
https://goo.gl/maps/zJLWKhfZrWfGPe7N7
Big and complex.
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Re: Smallest and largest freeflow interchanges
viewtopic.php?f=1&t=40885&p=1086016#p1086016
The biggest definitive single one in the UK I could find was Croft, with an internal area of 90 hectares. The only bigger ones were the M6-M6(T)-M42 at Water Orton, which is really a set of linked junctions and the M3-M27 that may or may not be a single junction. However both of these have some ends that drop off to roundabouts, so probably don't qualify for this thread.
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Re: Smallest and largest freeflow interchanges
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Re: Smallest and largest freeflow interchanges
For your pleasure ..... these are all in the vicinity of Cagliari:
1. A 'squashed' freeflow GSJ
2. A freeflow GSJ which appears to have been built using as many existing roads as possible!
3. An incredibly compact urban GSJ, which is freeflowing apart from where the red slips meet the yellow carriageway
Re: Smallest and largest freeflow interchanges
A10-A26
A7-A12
Re: Smallest and largest freeflow interchanges
That reminds me very much of the Ilford junction on the North Circular, which is of a similar design, although the slip roads cross one another at grade. Ilford_Bridge_Interchange
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From the SABRE Wiki: Ilford Bridge Interchange :
The junction was originally planned as part of the Ringways during the 1960s and early 1970s. The layout at the time would have been a roundabout with the M15 passing below. The southbound exit slip would have avoided the roundabout completely.
The M15 along with the rest of the