@Redskye572 Smog was there before I-10. It was urban sprawl and just a massive influx of people + the natural tendency for inversion layers that made the smog a big thing. Narrow gage trains/trams would never had made it thru the sprawI lived there from '58 to '78.
@attilatheblond the freeways made the smog worse. I remember in the 70’s/80’s trying to breathe through that yellow haze.