Section 31306 - List of restricted or prohibited highways(a) A list of highways restricted or prohibited pursuant to subdivision (a) of Section 31304 shall be published or updated by the Department of the California Highway Patrol semiannually.(b) This section shall become operative on January 1, 1987.Added by Stats. 1985, Ch. 814, Sec. 5. Section operative January 1, 1987, by its own provisions.