State DOT has some Honda CNG cars for engineers and specialists to use. They have private filling stations outside the fence at their garages. But you need one of their fleet cards to run the pumps. And those with take-home cars for after-hours responses can get a waiver for gasoline if they live too far from a State tank.
Other agencies just loan some of their executives Priuses (Prii?) mixed into the fleet with the standard Impalas and Fusions.
"It's not easy being 'green'." - Kermit the Frog
Someone said "Making good decisions comes from experience, experience comes from bad decisions." I say there are three kinds of people: those who learn from their mistakes, those who learn from the mistakes of others, and those who never learn.