With a good sized family I often have at least one or two passengers for the Prism. The van does the family trips with 5 or 6 aboard. We remove the seats for hauling food for our church food pantry. The older daughters don't drive stick yet but I try to have a bicycle fit for each of us available. One daughter uses a bus pass to the community college 20 miles away; nobody bikes up Spencer Hill as there is no shoulder.
Since most of us do alot of solo travel commuting or for recreation, focus on two wheel vehicles makes sense. Think about all those poor folks stuck in traffic jams getting to work in Boston or LA; it takes an hour to go 20 miles! I suppose you could build a recumbent bike to look like a miniature school bus