Yes, exactly. San Francisco has a higher population density than most larger European cities (London, Madrid, or just Valencia) but the "outskirt parts" of the

Yes, exactly. San Francisco has a higher population density than most larger European cities (London, Madrid, or just Valencia) but the "outskirt parts" of the city seem more evenly spread out, whereas its European counterparts tend to maintain the more agglomerated village-style development throughout their outskirts. This style of undeveloped areas interspersed with denser neighborhoods, found in central areas in SF and larger European cities (but not as much in non-central areas of SF) tends to be far more effective for other urban factors such as public transport.