[sbe-eas] Alachua County FL attempts to use WEA as highway gateway notification

[FRANK BELL]

Dear Sean,
While some improvements may be possible with WEA, because there is no
message ID mechanism, it is limited. When mobiles and vehicle radios have
ATSC 3 AEA and 5G Broadcast (currently experimental in Boston), this would
make the problem worse. However because such mobiles and vehicles could use
the first received message and ignore repetitions this would be a better
future and leave WEA for mobiles without such capability. Also as polygons
are included, with the navigation would providing current location, an
improvement is possible.  While jurisdictions at present are not simple for
such mobiles, a database of equivalent polygons and the equivalent PSSCCC
could be provided by the jurisdictions for download to have this in memory.
Sincerely

On Wed, Oct 9, 2024 at 2:07 PM Sean Donelan <sean at donelan.com> wrote:

>
> During COVID, one state attempted to use geo-locate WEA alerts at state
> border crossings.  It did not work well, because cell phones kept
> re-alerting as travelers moved in and out of the many, mini-geofenced WEA
> alert boundaries. It generated public complaints about over-alerting.
>
> Alachua County attempted to do the same thing with evacuees crossing
> highways around the borders of Alachua County, FL.
>
> I admire the Alachua's EMA public service attempt, however the technology
> used for WEA phone geolocation doesn't work the way they think it does.
>
> The IPAWS folks may have more technical advice.  My suggestion is use a
> single county-wide alert (or single large geo-fence) to alert mobile
> phones one time as they enter the geo-fenced boundary.  Not lots
> mini-geofences at each highway crossing.
>
> You can see the WEA alerting map on warn.pbs.org around Gainesville, FL.
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-- 
Frank Bell  CEO, CTO
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