We have 3 (almost 4 drivers) and 2 cars in my family. If I can't ride, someone usually drops me off at work via car. I don't usually take the car myself. It just sits there in the parking lot all day doing no good.

Edit: When I lived in Japan, several of my neighbors worked for General Motors. GM paid for their cars and gas, but wouldn't pay for the bus/train. I worked near them, but worked for IBM instead. IBM paid for the bus/train. It took me about the same time to get to work as them if we left at normal times. We each chose the subsidized method. IBM -> bus/train. GM -> car. In their defense, they were test driving new models of cars, so there was some rationale to their choosing the more expensive and hassle filled commuting method.