Cal. Bus. & Prof. Code § 5413
Prior to commencing judicial proceedings to compel the removal of an advertising display, the director may elect to negotiate with the person entitled to compensation in order to arrive at an agreement as to the amount of compensation to be paid. If the negotiations are unsuccessful, or if the director elects not to engage in negotiations, a civil proceeding may be instituted as set forth in Section 5414.
To facilitate the negotiations, the Department of Transportation shall prepare a valuation schedule for each of the various types of advertising displays based on all applicable data. The schedule shall be updated at least once every two years. The schedule shall be made available to any public entity requesting a copy.
Ca. Bus. and Prof'l. Code § 5413