Hi again everyone
I googled the strobe light’s frequecy but there are many different information suc as 12Hz, 10-14Hz, <15Hz etc.
Isn’t there any standart frequecy value for emergency vehicle that use strobe light ?
Thanks in advance to anyone who will advise.
Not all EV use the same signals. Within a 20 minute drive of my location, I can find a region that uses Infrared strobes to actuate the traffic signals, another that uses visible strobes, and a third that uses the audible siren sounds to trip the lights. And the sirens have to be of a specific tone/oscillation to trip the sensor. I spent many years as a paramedic (flight and ground), and the systems are specific to the city/county/region they are setup in. It depends on which manufacturer had the best sales pitch.
It is also very difficult to get exact info (I haven’t looked in quite a few years though) on the specs for each system. 1) They are proprietary products of each manufacturer, and 2) It is illegal (in most places) to use such systems on non-authorized vehicles. Even authorized vehicles running just their opticon (the IR version I’m familiar with) without a good reason can get in trouble.
Another point: Any driver who is caring enough to want a detector, should be a good enough driver to have the situational awareness to notice an EV coming from a ways off. Installing a detector into a vehicle is just giving the driver an excuse to not pay attention. Any driver who normally wouldn’t pay enough attention, doesn’t care enough to think about this type of system. You should be checking every mirror and your gauges every 10-20 seconds or so. Reducing situational awareness is not a good idea. And those drivers who don’t give a damn to start with won’t even use the thing if it hits them in the face. I have followed drivers down the road for miles, (too) close to their bumpers blaring everything I had to get them to move.
Thirdly, at least in my local, yielding of right of way is NOT required. A motorist may continue on, at their pleasure, regardless of what an EV is trying to do, as long as that motorist would normally have right of way. That is why we are trained to stop at every red light and visually clear the intersection, I try to make eye contact with every first in line driver. Oddly enough, in my state an EV MUST yield to Mailmen and funeral processions (We’re pretty sure that’s why they died, the last ambulance had to yield to another funeral).
Side note on the use of Lights and sirens, On highways, EV’s will only gain 3-5 seconds per mile running ‘hot’, and city driving they only gain about 10-15 seconds per mile, on average. The one report I read long ago, showed that running ‘hot’ only makes an actual difference in <.1% of calls. Of course, we never know if our next call will be that .1%, so we run hot.