Longest dual carriageway in the world

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Sunil_of_Yoxley
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Post by Sunil_of_Yoxley »

It's definitely I-90 from earlier in the thread. 3000 miles approximately.
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si404
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Post by si404 »

Sunil_of_Yoxley wrote:It's definitely I-90 from earlier in the thread. 3000 miles approximately.
it just said longest dual carriageway - how is that defined?
  • longest continuous length of road without meeting oncoming traffic in the other direction the other side of some barrier (either a wide gap or a physical barrier like a kerb)?
  • longest road with one number that isn't single carriageway?
The latter has seemed to imply that if, say you have the A14, because that has a small bit of s/c at one end, that it can't count, even if the rest of it is the longest continuous divided roadway.

My Quebec - Baja California beats I-90 if the first criteria is used, as would a Keys - Vancover route using the other diagonal. Also, why would I-95 not count (other than it's length) - the gap in New Jersey is easily fixed by taking the NJTP instead. I-95 might be missing a bit, but you can still go from one end to another (and further, using US 1 (non-freeway) from the end of I-95 to the bridge to the Keys) without using a single carriageway.
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Sunil_of_Yoxley
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Post by Sunil_of_Yoxley »

Yes I keep on forgetting! Sorry! I assume I-90 has no Totsos?

I guess the UK equivalent would be the M6/M6 Toll/M6/A74/A74(M)/M74 combo.

Including Totsos, then this would be A38*/M5/M6 then as above then M73/A80/M80/M9/A9.

* or is it now A30?

I'm not too familiar with the Interstate network, so how many Totsos would be involved.
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Post by DavidBrown »

Sunil_of_Yoxley wrote:* or is it now A30?
Still the A38 - Exeter-Tamar Bridge is slightly further I think than Exeter-Temple. Remember the there is still a little single carriageway east of Bodmin despite the Goss Moor dualling to the west.
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Post by SouthWest Philip »

DavidBrown wrote:Still the A38 - Exeter-Tamar Bridge is slightly further I think than Exeter-Temple.
No it isn't! Temple is further from Exeter than the Tamar Bridge!
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Post by Ruperts Trooper »

Sunil_of_Yoxley wrote: Including Totsos, then this would be A38*/M5/M6 then as above then M73/A80/M80/M9/A9.

* or is it now A30?
Surely M73/A80/M80/M9/A90/A956 to Torry in Aberdeen ?
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Re: Longest dual carriageway in the world

Post by Tinpusher »

Good Lord, this thread has emerged from the crypt, all tattered mouldy funeral suit and skeletal remains.
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Re: Longest dual carriageway in the world

Post by punyXpress »

M25
infinite mileage there!
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Re: Longest dual carriageway in the world

Post by ForestChav »

punyXpress wrote:M25
infinite mileage there!
No there isn't
C, E flat and G go into a bar. The barman says "sorry, we don't serve minors". So E flat walks off, leaving C and G to share an open fifth between them.

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Was92now625
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Re: Longest dual carriageway in the world

Post by Was92now625 »

But it does raise the question about what is meant by 'longest'

Furthest you can get as the crow flies from your original location ?

Longest distance you can travel without repeating yourself ?

I'd say the former is more 'worthy' but this has not been stated.
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Post by orudge »

Ruperts Trooper wrote:Surely M73/A80/M80/M9/A90/A956 to Torry in Aberdeen ?
Is it meant to be freeflow? If so, you'll only get to Dundee.
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Post by A8000Bob »

orudge wrote:
Ruperts Trooper wrote:Surely M73/A80/M80/M9/A90/A956 to Torry in Aberdeen ?
Is it meant to be freeflow? If so, you'll only get to Dundee.
Dunblane. :wink:

You could of course go M80, M876, M9, M90, A90 to Dundee.
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Post by Philadelphus »

multiraider2 wrote:Just off the top of my head and as an opening gambit: I-95 which runs down the entire eastern seaboard of the USA and is I believe 1,894.04 miles in total.

However, this is bound to be wrong and just doing some basic research, is there a gap in New Jersey? However, even if the number isn't continuous, the dual carriageway surely is.

Failing this and if different route numbers can be used, you must be able to get a DC route from the furthest South West USA to North East USA or from Homestead, Florida (South East) to Vancouver, Canada say and even if you can't (because a border crossing won't count) to somewhere else in NW USA.
There is indeed a gap in New Jersey, conveniently situated directly between me and my mother's house. Every time I go I have to decide which thirty miles of non-freeway I feel like using that time. (I could use the New Jersey Turnpike but my mother's far enough west that it's actually a bit out of the way.)

But even without the gap, I wouldn't assume a thousand-mile Interstate has a thousand-mile central reservation. It might, on an older urban stretch or a bridge, become a concrete barrier, and there are bridges on the Interstate system with no reservation at all (so that they can adjust the number of lanes heading each direction at rush hours. A bunch of bridges in the Philadelphia area have this sort of thing: http://www.flickr.com/photos/triborough/493207870/
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Re: Longest dual carriageway in the world

Post by Philadelphus »

Tinpusher wrote:Good Lord, this thread has emerged from the crypt, all tattered mouldy funeral suit and skeletal remains.
I just noticed I'd replied to a 2006 post....

(But while we're at it, there are TOTSO's on I-90 in Cleveland. Including the infamous "Dead Man's Curve." Which is thus on topic to this post.)
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Post by orudge »

A8000Bob wrote:You could of course go M80, M876, M9, M90, A90 to Dundee.
That's what I was thinking, yes. :)
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