Cal. Health and Safety Code § 114685

(a) The Department of Transportation shall include within its criteria for funding, repair, and construction projects, the need for adequate emergency evacuation routes. (b) State and local law enforcement agencies shall ensure all of the following: (1) Traffic flow plans for areas outside the emergency planning zones shall adequately reflect the possible evacuation of residents outside those zones. (2) Traffic flow plans shall take into consideration that some evacuation routes may be impassible under certain weather conditions and shall have plans for designating alternative routes. (3) Officers who may be needed to respond during a nuclear powerplant emergency shall receive the necessary training, including refresher courses at least once each year. (c) Local jurisdictions within an emergency planning zone shall coordinate nuclear powerplant emergency response plans and procedures with local governments and shall participate in training, drills, and exercises as needed.