Upvote:1
Contrary to @jacaron's comment above, "pedestrians prohibited" signs are commonly posted at all California freeway entrances. Here, chosen at random, is the entrance to the s/b Central Freeway (Interstate 80/US 101, at Market Street). The prohibitory sign is located about 10m behind the green "Freeway Entrance" sign.
Here's the prohibitory sign in close-up:
The advice not to walk on freeways, however, is very well taken. The "sidewalk" in the above picture disappears just beyond the sign.
A person walking on the freeway stands an excellent chance of being hit by a car In any event, pedestrians on freeways are not tolerated by law endorcement and will surely be stopped and removed (at least) by the first passing police or Highway Patrol officer.
Source: I'm a lawyer, and I've lived in California my whole life.