It cost $1.1 billion for that carpool lane. Since it doesn’t work, I think they should just take it off.
Studies have consistently shown that carpool (HOV) lanes don't improve traffic flow. In fact, every study done, has shown that they actually impede the flow of traffic.
But it's one of those 'article of faith' things for liberals, so you can expect them to build even more of them in coming years.