[Tagging] How to tag a "overhead electronic display" ?

[johnw]

> On Nov 1, 2015, at 12:04 AM, Gerd Petermann <GPetermann_muenchen at hotmail.com> wrote:
> 
> traffic_sign=changing 
> or 
> traffic_sign=variable 

The matrix displays and variable signs are very different. 

Most speed limit signs in Japan are “variable” - they are small numeric screens that usually vary between 50 and 100 based on weather. Int his case, the number is variable. 

a matrix sign can become entirely different signs. They are also a  source for alerts and current info no matter the topic - whereas a variable sign for the speed limit is pretty limited to displaying a number value, or a traffic map sign limited to just displaying red where traffic is - they can not warn of closed lanes, high winds, snow, landslides, car fires, earthquake closures, and other things that can popup on the signs besides traffic info. 

The matrix signs are truly separate from a variable value sign - but I’m not sure of the proper tag for them. 

Javbw
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