I haven't owned a car since '99 so i don't really sweat it. That's not to say that the cost of energy doesn't effect me. I had some downright outrageous gas bills over the winter. But we're in the process of weatherproofing the house (it's 122 years old) so we expect next January's bill to be about 1/2 of what it was this year.
In any case, I filled up the car (PhillyCarShare) before i returned it last night. I wasn't paying, it comes with a fleet card, but i noticed that it was $3.07 a gallon. Gas in NJ is about $.17 a gallon cheaper. Most of that is because the gas taxes are a lot less. I used the Prius and, according to the onboard computer, i averaged 42mpg on a 180 mile r/t. So the fuel cost of my trip was about $14. I paid $47 total for the trip. It woudl've cost $56 for two people to take the train.
Anyway, If i drove to work everyday, in that Prius, my weekly gas bill would come to about $1.50. Of course, i don't drive to work, it's only two miles so I normally ride my bike and occasionally i'll walk.
USA Today did a poll recently
http://www.usatoday.com/news/nation/2007-05-17-gas-prices_N.htm
And what i found astonishing is that 64% said that, no matter what, they would not take transit to work. What's almost as astounding is that 86% said that, no matter what, they wouldn't move closer to work or work closer to home. Another 41% said, no way, no how, will they get a more fuel efficient car. To me, that's the height of an arrogant sense of entitlement.
Sure, it's your choice, spend as much of your discretionary income as you want on transportation. To me, high discretionary spending, on arts, leisure, restaurants, etc is the hallmark of a healthy service economy. When the denizens of your region are sending most of that money to Exxon, Shell, BP, and Citgo they're not spending it at home.
If we have 2 million households in this region and they all spend an extra $20 a month on getting from point A to point B that's almost $500,000,000 a year that they're not spending at home.
I'm not sure how anyone can think that a region where people are unwiling or unable to change their lifestyles has any future. It's basically like putting the nails in your own economic coffin.