Canada

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.