The other day I lamented that the nation’s population and economic center of gravity seems to be moving toward less walkable and sustainable areas. So if people and companies are voting that way through their market transactions, what do we make of a survey where a majority of people self-report that they do in fact want to live in walkable communities, and real estate markets tend to reflect this. It’s a logic puzzle, but I’ll offer a few thoughts.

First of all, when people are polled on what they want in a house and a community, they also say they want ample free parking. It sounds great to have ample free parking AND walkability, but the laws of geometry simply don’t allow this. This is because most cars are sitting still most of the time, you need large amounts of parking to accommodate peak demand (for example, a mall during holiday shopping season), and cars need a lot of room to maneuver in addition to the space they take up when they are parked or trying to get from point A to point B. People do not understand this – when everybody has a car, the space required to accommodate the cars requires things to get too far apart to also have walkability. People walk less and less gets spent on walking infrastructure, and it becomes a vicious cycle.

Geometrically speaking, the only ways to solve this conundrum might be alternative vehicles such as bicycles and golf carts which don’t need so much room to maneuver and can be parked very efficiently. The problem is, these vehicles are not safe to be in around high-speed highway vehicles and trucks. So all these forms of transport really need their own lanes and signals to make it work. This is way too much change and perceived expense for America’s can’t-do urban planning crowd. And the public tends to turn on anything they see as infringing their freedom to drive fast and park anywhere they want for free. No matter what they say in a survey.

Linear cities might theoretically work. This seems very science-fiction, but you could maybe have a nice skinny walkable city with a sea of parking lots on one side of it, so everybody is within easy walking distance of everything they need including their car. But in this case, the only reason to own a car would be to go on an inter-city trip, and rail or buses would make more sense. If anyone knows of a previously undeveloped continent where this can be tried, let me know.

Gentrification, perceived and/or actual, is another issue. What I see in Philadelphia is that clean, safe, walkable, green neighborhoods with good schools are in very short supply. Prices get bid up for things that are in short supply, so wealthier people live in these areas. Wealthier people are also more vocal about demanding infrastructure and services from their government. So they demand, and they get. Meanwhile, less well-to-do neighborhoods notice all this, and they complain. The government can’t or won’t spend the money to provide excellent services and infrastructure to all neighborhoods, so a very convenient and cheap solution is to provide them to nobody. The only beneficiaries are slum lords and owners of nuisance businesses like junkyards and building material warehouses in the middle of residential neighborhoods (yes, I have somewhere very specific in mind when I bring this up), some of whom are politicians or in bed with politicians. This is all a downward spiral.