Talk:Traffic flow

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I just started to write something about this topic in really interested in (and I'm working on, too). I hope someone will like it. I'll add something more these days, I hope. achab 10:50, 4 October 2005 (UTC)

Good start[edit]

Yes this is a good start. Some parts (notably the three "scales" section) need to be rewritten to sound more like an article. I'd remove the use of second person and perhaps explain the scales a bit more. I would work on it, but I'm afraid of changing the content, as I don't understand exactly what it means (sorry about my lack of expertise. Horncomposer 01:09, 26 December 2005 (UTC)

Should there be something here about the Traffic Assignment Problem, Deterministic User Equilibrium (DUE), and Stochastic User Equilibrium (SUE). -- Anonymous

I don't know these problems, sorry. --achab 10:30, 31 August 2006 (UTC)

Little improvement[edit]

tx. now I changed a few senteces, to clarify it a little. I hope the readers will be satisfied... lol achab 23:18, 31 March 2006 (UTC)

Merge from Traffic flow analysis[edit]

Please merge any relevant content from Traffic flow analysis per Wikipedia:Articles for deletion/Traffic flow analysis. (If there is nothing to merge, just leave it as a redirect.) Thanks. Quarl (talk) 2007-02-26 09:39Z

Globalised a bit[edit]

I've added some European perspective as the article seemed to be written from a purely theoretical/USHA perspective. I've tried not to make it a sales catalogue, but the road authorities here often develop their own approaches which they build into software packages (via commercial contracts) and them mandate the use of their sw packages on the schemes that they fund. Ephebi (talk) 12:10, 14 February 2008 (UTC)

lead[edit]

currently reads: The first attempts to give a mathematical theory of traffic flow dated back to the 1950s, but to this day we still do not have a satisfactory and general theory to be applied in real flow conditions. I propose: Attempts to produce a mathematical theory of traffic flow date back to the 1950s but have so far failed to produce a general theory that can be consistently(?) applied to real flow conditions. My interest is purely to make the text flow better - I don't know enough about the subject to know what the original author meant exactly, otherwise I would have just gone ahead and made the copyedit. Can anyone clarify? Scriblio (talk) 11:40, 27 September 2008 (UTC)

IME (which is a few years old now...) the starting model in a scheme is calibrated by applying factors so that the current state matches the actual measured flows. The results that you would expect to see in a model also depends on the level of detail that you attempt to model, so I'm not even sure that premise is very relevant. Be bold ;-) Ephebi (talk) 20:34, 28 September 2008 (UTC)

Article name : "Traffic flow theory" or "Traffic flow"[edit]

User:Jack-A-Roe had moved this page to "Traffic flow theory" without notification or consultation. Before renaming the article again perhaps the merits can be discussed here first? I have restored the page back to its original title as "Traffic flow". According to the reference given, "traffic flow theory" is jargon for one US-specific instance of the wider study and modelling of traffic flow (see Revised Monograph on Traffic Flow Theory). That instance relates to the theoretical capacity of free flowing networks; while perhaps it is useful for rural inter-urban expressways it is only part of the story as, AIUI, it is not very relevant to a lot of the design of non-congested, urban networks. thus using the jargon title would de-facto exclude a large proportion of the article and make it US-specific. 23:13, 27 December 2008 (UTC)

I support renaming the article.
"Traffic flow" (at least in the USA) is a very ordinary expression that refers to the actual speed, congestion etc. of traffic. The article content, however, is entirely about the scientific theory and analysis of traffic flow. I am not a professional in the field, so I can't comment as to whether "Traffic Flow Theory", "Traffic Flow Modelling", or something else would be the best title.
@Previous commenter: I think you meant to type "congested, urban" rather than "non-congested, urban" in your last sentence.NinetyNineFennelSeeds (talk) 20:00, 10 November 2009 (UTC)
I don't see why theory and practice couldn't be covered in the same article. So "traffic flow" seems appropriate to me. It's just that nobody has written about the common usage of the word yet. But ditto NinetyNineFennelSeeds, I don't actually know anything about the topic. -- intgr [talk] 17:04, 17 December 2009 (UTC)

Related articles[edit]

Newell's Car Following Model and Three-detector problem and Newell's method - notable enough for separate articles? Perhaps merge here. Rd232 talk 11:17, 17 November 2010 (UTC)

"Traffic Stream Properties" Section Needs Improvement[edit]

The section currently named 'Traffic Stream Properties' is in desperate need of improvement. The content of the section seems good, but as it is, the page is very poorly laid out. The equations reference variables and diagrams that are never defined, and it is very unclear. Also, the use and notation of some of the variables could be greatly improved. (June 17, 2011)