We didn’t get here by accident. Cities across the country have been designed for and around the use of private cars — the least efficient transportation mode in terms of the number of people that can be moved per hour. For individuals, cars seem to make a lot of sense. They can serve a lot of different trip types (going to do the shopping, picking up the kids, dropping by the grocery store, visiting the cafe, getting to work in the morning), they work in all sorts of weather, and thanks to plentiful parking, they’re practically “dockless”: you can park them almost anywhere including outside your own house in the public right of way, without paying anything. But, most of the time — 95 percent by many estimates — private cars sit idle.