Its a lot smaller than that, the problem is that it takes a bit of change by EVERYONE.
That's my point … I have a car. I do drive it. But every time I put gas the tank I feel like a total shit. (I had lived 30+ years of my life without owning or having direct access to a vehicle). So I try to find ways around it to do it as little as possible. I didn't tell people not to drive their cars. My point is that everytime you drive when you could walk, cycle, coordiate your trips in the car, or use public transit, you are feeding the Beast. How many cars in rush hour traffic are SOVs? 90%? 95%? What would it take to get some of those people to take even the simple step of thinking of organizing car a car pool? Something NEEDS to motivate people to do this, to make simple (and maybe not-so-simple) lifestyle decisions that they will receive a benefit (whether its real or perceived) from.