Carpools are good. Since you probably won't be driving, you can offer something else in return that person finds of value for themselves and doesnt cost you too much. For instance I wouldn't mind a home cooked meal for lunch a couple times a week for adding a few minutes to my daily commute. Couple this with public transportation and uber (for the times you cant depend on someone) and you can probably come out cheaper than owning a vehicle. On the days I'm going into the city and dont want to bother with parking, I would take public transit most of the way, then uber for the short distance. This cuts down on ride sharing cost tremendously.