> LA should be the perfect city for mass transit, heck it was in the 1920s and 30s In 1920, the population of LA was less than 600,000 (https://www.laalmanac.c

> LA should be the perfect city for mass transit, heck it was in the 1920s and 30s In 1920, the population of LA was less than 600,000 (https://www.laalmanac.com/population/po02.php https://www.laalmanac.com/population/po02.php), and the built up area was a lot smaller (https://lamag.com/lahistory/citydig-this-1929-map-tracks-l-a-s-population-boom-at-the-turn-of-the-20th-century https://lamag.com/lahistory/citydig-this-1929-map-tracks-l-a...) I guess its population density also was quite a bit higher, making it harder to serve the population well with public transport using vehicles that can transport many people at a time. > Show me on the map where we would put the lines without displacing thousands of people Having said that, mass transit includes buses. There are zillions of roads in LA. On the main roads dedicate one lane in each direction to buses or, better, light rail. Main problem will be how people would get to stations. You could change one lane on minor roads to a bidirectional bike lane, but such bike lanes would not only be unattractive to ride on, but also dangerous because they’d frequently cross huge roads. So, I don’t think that would solve this problem well enough.