To measure the health of our transportation hotel, let’s start by looking into how much money we spend on car ownership and how often we actually use our cars. It may shock you, but Americans spend more than $2 trillion every year on car ownership — more money than we spend on food. What’s even more staggering is that for all the money we spend on them, the 250 million cars in America are only occupied 4% of the time. That’s the equivalent of 240 million of the 250 million cars being parked at all times. For the most part, your car isn’t actually a driving machine at all. It’s a parking machine.