It's UC-fucking-LA. It's not in the middle of a freeway, and I doubt she lives on a freeway either.
Looks pretty walkable to me. It may be a windy route, but in that case, bikes can ride anywhere cars can, except for highways, and even though it's near a mountain, I don't see anywhere that's 100% cut off from the outside world except for freeways. Zoom in anywhere and there are little roads there.
Hell, if I lived there and were faced with that option, I'd ride my bike on the freeway every day until I got a ticket for doing so.