Any person who violates Section 594, 640.5, or 640.6, on a freeway, or its appurtenances, including sound walls, overpasses, overpass supports, guardrails, signs, signals, and other traffic control devices, is guilty of a misdemeanor, punishable by imprisonment in a county jail not to exceed one year, by a fine not to exceed five thousand dollars ($5,000), or by both that imprisonment and fine. As a condition of probation, the court may order the defendant to perform community service not to exceed 480 hours over a period not to exceed 420 days during a time other

than his or her hours of school attendance or employment.