[Tagging] Billboard or something else

Graeme Fitzpatrick graemefitz1 at gmail.com
Fri Nov 1 00:46:37 UTC 2019

Added details to the traffic-sign wiki

Comments or additions welcome!



On Thu, 31 Oct 2019 at 13:47, Michael Patrick <geodesy99 at gmail.com> 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
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