There's a cool approach called Transit Oriented Development[1]. You build a corridor of public-transit, and rezone the area around the corridor for higher dens

There's a cool approach called Transit Oriented Development[1]. You build a corridor of public-transit, and rezone the area around the corridor for higher density. Then it becomes economically viable for developers to build higher density in those areas and the urban infill can occur more organically. [1]: https://en.wikipedia.org/wiki/Transit-oriented_development https://en.wikipedia.org/wiki/Transit-oriented_development