I was not entirely correct but part of the problems is that the car pool lanes are overloaded here and the federal laws have some minimum average speed requirem

I was not entirely correct but part of the problems is that the car pool lanes are overloaded here and the federal laws have some minimum average speed requirements for those lanes which are not being maintained. So they are kicking out the older clean-air cars. Also they are trying to find ways to give lower income individuals access to clean air vehicles.