Opticom

[Robert Gift]

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.)

[Robert Gift]

I dunno, if the frequency isn't to high then maybe it could

Oh, do you mean the IR frequency?

A traffic department caught a "MIRT jerk" by discovering the same vehicle
traveling through an intersection on their intersection cameras.
On TV news I did not see the MIRT flashes on the intersection camera videotape.
They had to examine tapes and find a/the common vehicle during times the signal was preempted. Preemptions are documented.

[Lemfedfak]

To early.

[Robert Gift]

To early.

You mean: "Too early." ?

Not as bad as you think.

Welcome!
Your link yields: 404 Not Found

Robert - XVII

[Daniel]

I'm not sure exactly what system is used, but most communities in the state of Washington have an indicator on each intersection controlled by traffic signals that comes on several blocks ahead of oncoming emergency vehicles. I once stood on a corner in Vancouver and watched as the lights came on one by one, about seven blocks ahead of an ambulance. As soon as it passed, the light went off. The lights are usually white or red, and can be rotating beacons, strobes, steady lights with a clear, prismatic diffuser (Vancouver's lights are like this), plain white light bulbs, or sometimes a red or white floodlight aimed at oncoming drivers.

[Robert Gift]

Doesn'that hold up too much traffic too long?

Can you see any rapidly flashing Opticom strobe lights on the EVs which may be what triggers those specialights?

Some places which have centralized traffic signal control can preempthe signal cycles manually. Especially now if they are video monitored.

Probably the besthing about Opticom is that it gives traffic ahead of the EV a green thru-signal (and green left arrow if any) and vehicles can move and clear before arrival of the EV.
Best to NOT sound the siren so everyone does not freeze in place and keep the intersection blocked.

OK, who is raising my Karma?

No longer Robert the -XVIIth