The HOV lanes have a vehicle flow of 1600 per hour, compared with 2000 per hour for a standard lane.
Ok, i'm not great in math... but if the carpool lane has an average of 1600 per hour compared to 2000 for the other lanes, then isn't it working? Because you need a minimum of 2 people per car i believe, that would mean those 1600 cars are transporting at minimum 3200 people. Whereas each standard lane are only transporting 2000.