Added details to the traffic-sign wiki https://wiki.openstreetmap.org/wiki/Key:traffic_sign
Comments or additions welcome! Thanks Graeme On Thu, 31 Oct 2019 at 13:47, Michael Patrick <[email protected]> wrote: > > > what I meant was that we might want to distinguish between those that >> show information and those that show traffic signs to which you must obey. >> > > There is no way to distinguish this, unless you have access to the > programming, and a fair number are automated to flex to traffic > conditions. > > The various American standards show these as Dynamic Messaging Signs, with > other older content showing "character-matrix" Variable Messaging Signs, > mostly with the 'text only' as VMS and the more modern "full-matrix" > graphic technology as DMS. Other sources say the opposite. > > In Europe, they are still mostly known as VMS, there is some discussion > here: > See "Dynamic message signs: differences between Europe and North America" > > https://www.traffictechnologytoday.com/opinion/dynamic-message-signs-differences-between-europe-and-north-america.html > > The international ISO standards for intelligent traffic systems say "NOTE: > A Variable Message Sign is also named dynamic message sign. Both terms are > considered as synonyms and can be used interchangeably." > > On that basis, the Solomon's choice ( > https://en.wikipedia.org/wiki/Judgment_of_Solomon ) would be to use to > tag them something along the lines of "DMS/VMS","DMS-VMS", because almost > every source (North American, British, European, etc.) I found uses that > sort of contraction as the convention, including the manufacturers. For any > sub-tagging, the standards bust out further details according to the > display tech, fixed or mobile, size, etc. > > The ones that change state according to a single variable or condition, > like only speed, or lane open/closed, chains required, road flooded, etc. > IMHO are more akin to the normal signs, in that even a normal parking sign > has 'variability' of states built into the message. > > Ref: > https://www.nema.org/Standards/Pages/Hardware-Standards-for-Dynamic-Message-Signs-with-NTCIP-Requirements.aspx > > https://blog.ansi.org/2017/02/dynamic-message-signs-dms-electronic-road/#gref > > Michael Patrick > Data Ferret > > _______________________________________________ > Tagging mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/tagging >
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