do you really need to drive car 100% of time? there are other alternatives besides hybrids: motorcycles and scooters get 50-80MPG real life MPG, cost less then the difference btw hybrid and non-hybrid and can be an effective daily transportation for those 90% of the time when there is only one occupant in the vehicle.

In last 2 years my MC had seen 35,000mi with avg 70mpg in mixed rush hour traffic. It burned 500gl of unlead which would only last for 10,000mi in 20mpg minivan it replaced for commuting duty. On top it classifies as HOV, costs less to park