I road those freeways to downtown LA in the late 60s on a modified Yamaha yds-3 cafe style 250. The traffic was bad then, but the smog was worse. Sometimes I would have to pull over and just let my eyes cry out the soot. I must admit that on my way home to the Valley the transition ramp from the Pasadena Fwy to the Golden State with expansion chambers singing was MAGIC!
"smog" in 1967 came to my mind, too - when looking at these recent photos.
I had friends in Downey and Pasadena. In the evenings we'd sit on the porch and watch the cars go by....the beams of their headlights in the smog made it look like we were in a London fog.
I've been under the impression that, somehow, even with all these cars, smog is less of an issue out there?
Did cat converters do all that?!
Never a fan of the LA area, partly the weather - though I married an 18 yr old girl there as soon as I turned 19. San Diego and San Fransico - I liked, a lot.
Spent time thumbing & sleeping the Pacific coast of Baja, MX - lots of SoCal surfers down there for company when I wanted it - but would never try that these days!
Stig