[trikkonceptz]

It's seems obvious to me, but in order to begin raising MPG's in your line of cars, (Insert Brand Here), why not implement and engine cut off like the hybrids do when idling?

I have to imagine that a change like that alone can have a significant impact on the MPG's of any vehicle. Now to go along with that some design changes would have to be made like an electric a/c system, but that already exists, so what am I missing?

I think if all the cars at an intersection were to shut off and sit silently while we wait for lights to change the impact would be incredible .. not to mention automakers could boast about a bump in MPG's to stay ahead of government regulations.