This happens in my home state. We have High Occupancy Vehicle lanes, which require at least 2 people (some roads-3). The maximum fine was recently raised to $53

This happens in my home state. We have High Occupancy Vehicle lanes, which require at least 2 people (some roads-3). The maximum fine was recently raised to $536, but the final amount is still up to the State Patrol who writes the citation, AND you can plead in court, AND I see State Police check for violators maybe 2 times a month (I-405 between Renton and Newcastle), AND only when its good weather AND where there is plenty of space on the shoulder to pull over drivers. For most people, they're better off using the HOV lanes illegally as the expected cost is effectively $0. EDIT TO ADD: I commute with my kids, so I use the HOV legally. My reverse commute with against rush-hour, so there is no incentive for me to use them solo.