Wayne, KC8UIO wrote:
"I still think your biggest hurdle will be a legal one.

When life is at risk, there are no prohibitions on radio transmissions.

Disruption of all normal channels is unecessary and undesirable. Some
won`t be tuned-in and won`t immediately get the message. Nearly everyone
has eyes and ears. Sight and sound are useful to communicate.

Air horns as used on locomotives are designed to get attention. They are
heard at great distances.

Illuminated message boards are used for travel information along hiways.
They are also used for advertising on the Goodyear blimp and other
vehicles. They are towed behind airplanes.. They can be programmed by
recorded media, wire lines, and radio, even satellite.

Where I live, we have a traffic control central which monitors streets
and hiways using video cameras. It gives travel conditions and
approximate times required along various routes.. This is reported on
the illuminated displays and by radio and TV stations.

A display can`t do anything about hiways clogged when people are
stampeded by officials telling them to get out of town, other than warn
them away from the clogs.

Some people don`t have the means to get out of town. Others rush into
what becomes a huge parking jam. We don`t have room for all the vehicles
on the hiway at once. It`s a free country and we cant enforce private
access to roads and streets.

We have marked evacuation routes. Everyone can`t use them at the same
time. When they try, nobody moves anywhere fast. When officials order an
evacuation, they must also advise rail times and places of departures.
Bus schedules must be given too, to keep some of the automobile load off
overcrowded hiways. Airline information needs to be broadcast too. The
transit central`s website needs to be broadcast for internet access.

We had an "emergency broadcast system" ehich tested OK. It could be
activated for purposes besides an atom missile. We had air raid sirens
that could be used to alert people to tune-in for vital information. We
don`t need yet another untested system.

Best regards, Richard Harrison, KB5WZI