I passed through at least 2 speed enforcement officers in CA on this trip. Both were on 101 from LA north. Both were a single officer with radar. Others may have had radar, don't know. And don't most use laser these days?
Years ago I asked a San Jose officer at Starbucks about the radar trap that I went through every day. He politely informed me that they don't have radar traps but rather "speed enforcement". :B But of course the same ticket and they always had customers every day.
Most truckers in CA stay under 63 MPH. At 65 they are pushing their luck and they with their commercial license don't want a ticket. Sure some go faster but not many in my experience.