On Wed, Oct 30, 2019 at 8:01 PM Warin <61sundow...@gmail.com> wrote: > The sign can display various messages - so variable message fits. > > Traffic sign also fits - the travelling time to another place reflects the > traffic density, and vehicle crashes are traffic warnings .. > > I think traffic_sign=variable_message is good for the feature you report. >
+1 for traffic_sign=variable_message In many jurisdictions road users must obey messages on these signs, including speed reductions (e.g. caused by weather), closed lanes (e.g. crash), and closed motorway exits/detours. Similar to these pixel based Variable Message Signs, there are what is usually referred to as a Changeable Message Sign which has a fixed set of messages (2-4) where narrow sections will rotate to display a message, usually used for closing rural roads without power, a solar panel will drive the sections to rotate into place. VMS are often used to display travel time messages so they do something useful until there is a higher priority message for motorists. In the Intelligent Transport Systems (ITS) industry there are also a bunch of others specialised electronic signs, including Variable Speed Limit signs (dynamic speed with the option of a flashing annulus/red circle, used either pole mounted on either side of the road or on a gantry above lanes, also used in school zones), and Lane Use/Control Signals (displaying the permitted usage of a lane usually mounted above the lane, i.e. open, closed, or indicating you need to merge, on motorways especially with tidal flow/reversible lanes). -- Jono
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