You ever talk to a taxi driver or a Cop about the issues maintaining fleet vehicles?
Example, early 90's Crown Vic's ate through brakes, etc.
Are these vehicles ready for this duty cycle?
These do not strike me as having the utility of cars they are replacing in terms of size. This like the energy bill is doomed for the law of unintended consequences, and may even open up the manufacturers to law suits.
IF the Mayor wants to go green, perhaps strongly suggesting converting the existing fleet to run on gaseous fuels, i.e. CNG/LPG-Propane would be a logical place to start.
Beam me up Scotty, there is no intelligent life (and no one with an engineering background) in New York City Hall....
I know a driver who converted his taxi to propane. He reckoned it worked really well. Perhaps someone ought to inform his mayorality about it :)