The OP article misses something. It says that cars are only being driven 4% of the time. That's probably true, but it ignores the 8 hours that it's sitting in a company parking lot while you're working. It's not on the road but it is in use as your work transportation. To return it to your home for another driver to use would require another driver. It will also double the miles driven because someone will have to drive it back to your work 8 hours later.
What they're looking at is public transportation, taxis and buses. Suburbia has killed off buses in this country. It would take a huge number of buses and new bus stops to service our suburbs enough to get people to use it. In a city with houses or apartments in close contact, it can and does work but most Americans don't live crowded together like that.
