One of the more interesting theories I've seen about traffic is that people respond to traffic the same as any other cost. Meaning that if it takes longer to g

One of the more interesting theories I've seen about traffic is that people respond to traffic the same as any other cost. Meaning that if it takes longer to get to the city due to more homes in the area, fewer people will be willing to make the drive. So the theory is that infrastructure use will always expand to meet capacity. I'm not saying I buy this idea to the extreme, but I think it's a pretty accurate model for how I make my travel decisions.