At the Fortune 500 company where I've worked for 20+ years, there are many more bicycles in the racks and motorcycles in the cycle lots this year than in previous years.
At any given time, there are more messages posted on the bulletin boards looking to form carpools than I've ever seen.
My family is much more conscientious about consolidating errands than before. I'm sure we're not alone in that regard.
It all causes me to believe some of us are trying to use less gasoline.
I certainly do, but the topology of Atlanta, where I work, and so on prohibits much savings. The places are where they are, and few people seem to work within a bicycle trip from home. Not only that, riding a bicycle during rush hour here is a sure-fire way of dying young.