The Clean Air Vehicle (CAV) program requires federal approval under Section 166 of Title 23 of the U.S. Code.

The federal government is notnot be extending the program, which means the underlying authority for the program expires.

California passed legislation to extend the program, but this extension is contingent on federal approval, which was not granted.

I was wondering the same thing, so thanks for the explanation. Disappointing that the article didn’t bother to explain it.

From Section 166 it looks like the state can also convert an HOV lane to an HOT lane and set the toll amount. The contrarian in me wants to believe there’s some ridiculous loophole in there…