Not everyone can live close to work. My wife goes north while I go south to work; we live in between. They have park and ride lots where car commuters meet and carpool. Unfortunately these are located near major interstates. Not very bike friendly. Depends where you are. I live about 27 miles from work and bike to the train; however there are times that I can't use the trains schedule, don't want to bike or drive 55 miles RT, so I "park and bike" I have scouted out 3 places to leave my car, all varying distances from my job.
Another place that you can often park are large shopping centers. Smaller strip malls may have a problem with someone parking in their lot all day but not the larger places. Neighborhoods often offer off street parking as well. I hate to use my car but this(park and bike) does offer another option for supper long commutes.