It’s a revenue stream: Someone gets close to the edge of their lane, or travels .0001 MPH over the speed limit, or 2 MPH under the speed limit (seen it happen) gets a ticket. Is your plate slightly loose on one side? Were you driving on a gravel road and dust has covered your plate? Pick up a rock chip in the windshield on your drive this morning?
Traffic cops target the easy tickets, not the truly dangerous events. Only when it’s right in front of them do they actually deal with serious hazards.
Maybe so. But I have commuted along a construction project for many months now and have never seen a cop car leave the construction area to chase anyone. The commute is daylight one way and half the time dark the other way. The construction is a widening project on I580 and I have assumed a law required police at each site.