Importantly, zoning is intentionally mixed, so a significant fraction of the population doesn't drive for much of anything unless they choose to move way into the suburbs and it is a very neighborhood-y city. When a building goes in, the lower floor is often restaurants/bars/retail/etc to allow everything to be local. This is important because Seattle's highways are at max capacity and they can't be expanded anymore due to geological limitations (surrounded by water, no unused land remaining). The only way to continue the insane pace of population growth is to build up in a way that minimizes the amount of driving required, so that is how they have been dealing with it.