I know the two precise frequencies.
They are under 20 flashes per second.
If too fast, they may cause siezures.
Does around 30 fps cause siezures? I forget.
But with everything encrypted, one agency's unit may not
preempt signals in another agency's area.
Denver General Ambulance now often takes patients to two Aurora
hospitals. Don't know if DG will preempt Aurora'signals anymore.
I shall e-mail Aurora traffic people who should make DG acceptible
on Aurora'system - if they have not already.
But would not be surprised they never thought of that, so my e-mail
may accomplish some good.
Hey, I managed to get a green righturn arrow installed at an intersection
which desparately needed one. Now there is no longer a huge line
of righturns stopping and starting, stopping and starting.
(I want a plaque on that signal crediting me!)(Wish I could sponsor
such arrows with credito Chim-Chiminey Sweeps where I work.)