In the US, one common type of externality that cars impose on society is mandatory parking space. Restaurants, shops, apartment buildings, etc. are often requir

In the US, one common type of externality that cars impose on society is mandatory parking space. Restaurants, shops, apartment buildings, etc. are often required to provide parking space. If you're in the US, just look around and notice how much area within cities is devoted to parking. What's the value of all that real estate?