Trooper Mark Francis of the Washington State Patrol notes that troopers often sit in the shoulders during rush hour.
They have their sights set on the primary targets - drunk drivers, speeders, reckless drivers, those not wearing seat belts - but also pull over those who abuse the high-occupancy vehicle (HOV) lane.
"We understand it is super annoying," Francis
"It's one of the ones where the enforcement is higher."
That said, it's not always obvious that a driver does have a passenger.
At times troopers will pull over a suspected single-occupant vehicle from the HOV lane only to discover that there is, say, a child buckled in a car seat in the back seat.
In cases like that, "we'll just let the person go on their way," Francis