interesting...
I recently had this discussion with a co worker, we live within eye sight of eachother, I bike to work, she drive and a third coworker takes public transportation.
I pay the least per month and I get to work faster during rush hour. if we end up working late and coming home after rush hour, I am slower than the car... but still cheaper.
We at first only counted actually costs of getting to and from work... then Bea was angry because I pay zero... so she asked us to count in maintenance costs.... I had far, far less than she did... no need to swap out summer and winter tires, I made all the minore repairs myself.. a break cble a couple of inner tubers, etc...
So, even with teh car sitting in the drive way, any me paying insurance, etc on it, I still save money by cycling...
yes, I would say that I am sucking in more nasty stuff as I ride in traffic, than those sitting in it in their cars... not sure how much more..
Robi