I've been commuting to Denver and get K band random instant on signals on my old V1 all along the way. I think CDOT or the Highway Patrol have installed timed instant on radar emitters on sign posts along the I25 and 36 to desensitizes us to our radar detectors instant on signals. Now when I get an instant on I look around before slowing which is probably enough time for a lock.
Further the units I think are doing it are solar powered so they only function during daylight. I haven't seen a radar trap in weeks and I think they'd have to turn the system off to set up a radar trap to avoid interference.
I'll try to get a picture of what I think are the emitters.