That's what I was wondering.
I remember the night in question too. There was a motorcyle in the HOV, and whilst I was speeding (so were they) I was a safe distance away as I hate driving behind motorcycles at night. The person, who stated they were an off duty cop (I call bull) said SPECIFICALLY "I don't know why an ambulance was in the HOV lane when there was light traffic" (Yes, because it's wrong for the ambulance, but ok for the motorcycle?)
So I had to talk to my operations manager, on my day off, about it. I preemptively accepted blame for speeding (I thought that portion of the road had a different limit, but I was still a bit above that too), but stated that I was a safe distance away.
It sounded like he understood the speeding though, since, per his words, we were going to a 3yo with a partial-FBAO.