I regularly visit Cali, and the typical highway driving scene more closely resembles one of the two scenarios:
- A barely moving parking lot full of bumper-to-bumper traffic, with only motorcycles moving via lane-splitting
- Half-empty highways, with slow-pokes religiously occupying the left-lane, with right-most lanes left empty for passing
I've rarely seen folks zig-zagging, as the good portion of the driving population is focusing on interacting with the phones, ingesting various forms of medication (herbal and otherwise), or coping with the side-effects of recently consumed medication.