Drove through here after work with wideband Ka enabled on my STiR+. Went on both sides of N 1st, making two U-turns. Picked up nothing.
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They might be doing it as an excuse to pull over a carload of suspected "illegals".
I am not sure if they do. They certainly are "allowed" to -- California has an EXTREMELY broad definition of "Peace Officer", who are allowed to enforce CVC/CPC. And that even includes some railroad employees and DMV officers.
But will they randomly ticket you on 101? I doubt it. But they have radar for a reason. I presume they do have some enforcement duty near the Presidio, but it's always such a traffic jam there that I can't imagine speeding is even feasible.
The last time I was stuck there, I did see one of the white and blue Suburbans put on his lights and sirens and race towards the bridge but who knows why.
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