Talk:Southern Expressway, Adelaide

World's longest fully reversible one way freeway claim

The Imigrantes/Anchieta freeway system in Brazil is probably longer. I don't know how long the fully reversible stretch is, but I'd estimate it at 25 km. Does anyone know more? I'll add a "disputed" note until claryfied. 137.222.40.132 13:33, 11 May 2006 (UTC)

I removed the (disputed) as the Rodovia dos Imigrantes appears to have a carriageway in each direction - the photo certainly has two carriageways, notable as they cross each other. Thankyou for raising it. --Scott Davis ^Talk 15:13, 11 May 2006 (UTC)

The two carriageways of Rodovia dos Imigrantes are both fully reversible. At some times they run in opposite directions, and at some times they run in the same direction, depending on demand. This fact can be verified from numerous newspaper announcements. Here is an example:

A partir das 16h, começa a funcionar a operação subida no sistema Anchieta-Imigrantes. A Ecovias irá adotar o esquema 2x8, com descida pelas duas faixas da pista sul da rodovia Anchieta. A subida será feita pelas duas faixas da pista norte da Anchieta e pelas três faixas da pista norte da rodovia dos Imigrantes e pelas três faixas da pista sul da rodovia dos Imigrantes. - Folha Online 08/02/2004 - 14h59 Volta do litoral terá esquema 2x8 a partir das 16h

Translation "From 16:00 onwards, the 8x2 scheme will be adopted, where the descent takes place on the two lanes of the southern Anchieta carriageway. The ascent will take place on the two lanes of the northern Anchieta carriageway, the three lanes of the northern Imigrantes carriageway, and the three lanes of the southern Imigrantes carriageway"

I'll reinsert "disputed" Klafubra 11:20, 6 July 2006 (UTC)

Sounds to me then that it's more than disputed, it's outright false. I suggest removing the "world's longest claim". Perhaps have a section at the end saying something like, "It is sometimes claimed to be the world's longest longest fully reversible one way freeway but in fact Rodovia dos Imigrantes is longer". Rocksong 01:14, 7 July 2006 (UTC)

Look at the wording:

The Southern Expressway is Australia's, and the world's, longest fully reversible one way freeway.

The Imigrantes/Anchieta freeway system is not explicitly one way. It can run in both directions. Thus the claim, although ambiguous, is true. Would it be possible to remove the ambiguity somehow? Perhaps the one way could be italicised. Could it be called the longest fully reversible single carriageway freeway? It would be better but is a bit of a mouthful.Mozzie 03:49, 23 August 2006 (UTC)

The Southern Expressway is wholly reversible—it either operates as 3 lanes south, or 3 lanes north. There is no 'middle ground'. Taking that into account, it is the world's longest fully reversible (fully reversible—the Brazillian system, as far as I can see, always leaves some lanes open in either direction) one-way freeway (the SeXy is only open one-way or the other). If there isn't any opposition, I'll be removing the disputed tag in the next day. michael ^talk 04:19, 23 August 2006 (UTC)

Good point. How about qualifying it with "single carriageway", i.e. The Southern Expressway is Australia's, and the world's, longest fully reversible, single carriageway freeway. Or add the word "permanently", i.e. the world's, longest fully reversible, permanently one way freeway? Though I agree that either is a clumsy mouthful. Rocksong 04:41, 23 August 2006 (UTC) 'Doh, my first suggestion is exactly what Mozzie said. In any case, I'm not fussed whatever we do. Rocksong 04:43, 23 August 2006 (UTC)

Thanks for the quick responses guys, how about The Southern Expressway is the world's longest exclusively one way, reversible, freeway. or The Southern Expressway is the world's longest reversible freeway that is exclusively one way. Cheers, Mozzie 06:31, 23 August 2006 (UTC)

'the world's ... fully reversible...' is what we should use. The Brazillian system would be 'the world's ... partially reversible' michael ^talk 07:12, 23 August 2006 (UTC)

I have thought about it and I still prefer the word exclusively as it means it is only ever one way. Perhaps it could just say the longest reversible one way freeway? To me, saying one way freeway implies that it is only one way. The word fully on the other hand, does not exclude the possibility that it can be partially reversed. So it would be correct to say that the Imigrantes/Anchieta freeway system is fully reversible.Mozzie 03:26, 24 August 2006 (UTC)

I would like to clarify a thing about the Imigrantes/Anchieta system: Imigrantes and Anchieta are two completely seperate highways. Although they run in parallel and connect the same end points, they follow geographically separated courses, and they are labelled as independent highways by the government. Since both Imigrantes and Anchieta can opeate in one-way mode, at least one of them qualifies as longest reversible one way freeway(whichever is longer). Klafubra 14:07, 6 September 2006 (UTC)

I have changed the opening sentence to: The Southern Expressway is world's longest reversible one way freeway.

I feel that this is correct because the freeway is literally one-way in that trafic only ever flows one way on it. However, the Imigrantes/Anchieta freeway system is not one way, it is a hybrid of two and one way. oops, I forgot to sign Mozzie 03:04, 25 August 2006 (UTC)

Freeway or Expressway?

The opening sentence designates the Southern Express a freeway, but in the infobox it's called an expressway. I believe they make the distinction between the two like they do in the U.S., though perhaps, not as strick. Is is it totally controlled access from end-to-end? The two designations need to be reconciled. --Criticalthinker (talk) 08:01, 2 March 2015 (UTC)

What distinction are you looking for? The road's name is "Southern Expressway". It is a Controlled-access highway. That article says that controlled access highways are often called freeways, expressways or motorways. It currently has traffic light intersections at both ends, but only grade-separated intersections and crossings along its length. --Scott Davis ^Talk 22:58, 2 March 2015 (UTC)

I thought I was pretty clear. The terms in the opening paragraph and the infobox should match up. It's called an "expressway" (small "e" and a particular/distinct kind of road) in the infobox, but is then also called a "freeway" in the second sentence of the article. This needs uniformity and clarification. It's a small change. Anyway, it appears that this is a "freeway" and no a small-e expressway in function. The latter is type of controlled acess that can have at-grade crossings. --Criticalthinker (talk) 12:24, 3 March 2015 (UTC)

Thank you. I doubt most South Australian users of the relevant roads would make that distinction. I think all three SA roads named "Expressway" are technically freeways by that definition. The Port River Expressway flows seamlessly into Salisbury Highway, which would be an "expressway" (left-in/left out at-grade as well as the Port Wakefield Road grade separation) until the traffic lights at Elder Smith Drive. --Scott Davis ^Talk 04:38, 5 March 2015 (UTC)

More information

Can someone add more photos of the expressway, maybe more maps? — Preceding unsigned comment added by 58.96.107.130 (talk) 12:09, 5 July 2016 (UTC)

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km in table

The distances on the table are clearly incorrect: the final distance (21 km) not only contradicts the reference used by the table (Google maps, which gives 18.5 km) but it also contradicts the official DPTI reference (which also gives 18.5 km). But I don't know how to get Google Maps to give the distances for all the other exits, so I've left it with a "dubious" tag which hopefully someone else can fix. Adpete (talk) 23:04, 4 January 2017 (UTC)

I have adjusted the distances. My technique is to use the "whole trip" URL for the reference, but then move one end of the Google Map journey to each exit and enter the distance from the other end to that exit/intersection. --Scott Davis ^Talk 03:52, 6 January 2017 (UTC)

I tried that, but obviously I was doing something wrong. Thanks! Adpete (talk) 04:51, 7 January 2017 (UTC)