On Mon, 3 Oct 2005 11:57:50 -0400, Ari Silversteinn
wrote:
You don`t need a radio tire truck. You need a SOUND TRUCK with an AIR
HORN to get the audience`s attention to listen to the message.
I have seen these systems and they have failed to do two things.
Be heard in a modern car with loud radio and great insulation and 2) pass
the populace acceptance test.

And you've offered this is during an obvious emergency? :
1 Why would they play music loudly in an insulated car when doom is
on their heels?
2 Why would neighbors complain of noise telling them they were about
to be die?

Richard's description adequately suits:
Local - that would reach out approximately 1 mile and "overbroadcast"
to those immediately in danger within a stationary site.

Your objections are more tailored to suit your solution than the
problem.

73's
Richard Clark, KB7QHC