There's a section of the coast road behind LAX (called Vista del Mar) that's like that. 3-ish miles long, the speed limit changes 7 times between 35 and 50. It's a popular public beach (one of the only in LA County where open fires are permitted), so it's usually pretty crowded. But that should be why the speed limit is a constant 35, not an exercise in whimsy.The road adjacent to the one on which I live is 35 mph for a random 1 mile section. State troopers sit there several times a month and write tickets between 9am and 6pm, hitting people heading to work, the store, etc. who dared drive 41mph on a straight stretch of road. Meanwhile coal truck fly through that same stretch at 70+ mph from 4-7am and the cops are never around then to issue tickets for genuinely dangerous driving.
It's a total scam.
And yes, I've gotten a speeding ticket there.