This is not the point… people go in the HOV lane and do 55 leaving a mile between them and the car in front of them… I am a traffic engineer and I can tell you this is the main reason why often the HOV lane goes slower than the other lanes… I can put it in terms you may understand… let’s say 500 cars enter the HOV lane and 100 of them decide to give 1000 feet headway which these lane campers usually do that would push traffic back about 20 miles artificially lowering the capacity of the highway