Ok, I see I got no response to my question.
Why I asked is that I don't believe there is any "need" for a strobe, as being stated.
Sure, if a light that fulfills your needs HAS a strobe feature, that's great, BUT, if you base your purchase on a light having a strobe feature, I certainly don't get it.
I have over 35 years in EMS and Fire/Rescue, and would never base my purchase on a light having a strobe feature, sure, if it's there GREAT, and I have used it, but it was nothing I couldn't have done without manually "strobing" the light.
As to traffic control, if you're in EMS and find a need to provide that, then get a "traffic wand", etc., and use the correct equipment for the job, NOT a strobe feature on a flashlight.