There’s a sense in which cars by their nature produce sprawl. Cars are larger than people, so if I want a building to contain N number of people, I need an empty space nearby that contains 3N of just emptiness waiting for a car, so our buildings can’t be too close together. There needs to be that buffer space between them for their cars.
Then people have to get to the parking lots, so we need roads. But if I want N people to be able to get here, I need more than that space between our parking lots for enough cars to be able to reach me. Not to mention left turning lanes and big intersections, and of course long stretches to get past the long parking lots.
So if we don’t have space for that in a city, we either have to knock down a bunch of buildings to make room for these things, it we have to expand outwards into the larger empty space outside the city. Which naturally leads to sprawl.
It’s amazing to actually do a satellite view of an area, take a screenshot, and then colour in the parts that are actually a building or shop or home, and then colour all the other parts that are road, driveway, parking lot, intersection. It’s this foam which sprawls.
It’s also worth saying that with cars vs transit the incentives flip. With cars I don’t want to make things too far away, but like in my previous comment I have to space things out some, and cars are good at going distances, so it’s not too bad for business to sprawl. Also, because I need parking for everyone, density of my building (like a multi-story building) requires an even greater density of parking. But parking garages are expensive, so it’s easier for me to build a bunch of single story buildings with big surface parking lots.
On the other hand, with transit and pedestrians distances are much more significant. The goal now is to try and get as many things as possible to where the people already are. In this mode, building up is much more sensible because the more housing or offices or businesses you can put on this plot, the less people will have to walk to get there and the closer they are to prominent transit stops, etc. And if I don’t need parking, then I’m incentivized to put another building right next to this one to try and hit those same people without them taking more than 20 steps.
There’s a sense in which cars by their nature produce sprawl. Cars are larger than people, so if I want a building to contain N number of people, I need an empty space nearby that contains 3N of just emptiness waiting for a car, so our buildings can’t be too close together. There needs to be that buffer space between them for their cars.
Then people have to get to the parking lots, so we need roads. But if I want N people to be able to get here, I need more than that space between our parking lots for enough cars to be able to reach me. Not to mention left turning lanes and big intersections, and of course long stretches to get past the long parking lots.
So if we don’t have space for that in a city, we either have to knock down a bunch of buildings to make room for these things, it we have to expand outwards into the larger empty space outside the city. Which naturally leads to sprawl.
It’s amazing to actually do a satellite view of an area, take a screenshot, and then colour in the parts that are actually a building or shop or home, and then colour all the other parts that are road, driveway, parking lot, intersection. It’s this foam which sprawls.
It’s also worth saying that with cars vs transit the incentives flip. With cars I don’t want to make things too far away, but like in my previous comment I have to space things out some, and cars are good at going distances, so it’s not too bad for business to sprawl. Also, because I need parking for everyone, density of my building (like a multi-story building) requires an even greater density of parking. But parking garages are expensive, so it’s easier for me to build a bunch of single story buildings with big surface parking lots.
On the other hand, with transit and pedestrians distances are much more significant. The goal now is to try and get as many things as possible to where the people already are. In this mode, building up is much more sensible because the more housing or offices or businesses you can put on this plot, the less people will have to walk to get there and the closer they are to prominent transit stops, etc. And if I don’t need parking, then I’m incentivized to put another building right next to this one to try and hit those same people without them taking more than 20 steps.