California Code, Vehicle Code - VEH § 21456

(1) A “WALK” or approved “Walking Person” symbol means a pedestrian facing the signal may proceed across the roadway in the direction of the signal, but shall yield the right-of-way to vehicles lawfully within the intersection at the time that signal is first shown.

(2) A flashing “DON'T WALK” or “WAIT” or approved “Upraised Hand” symbol with a “countdown” signal indicating the time remaining for a pedestrian to cross the roadway means a pedestrian facing the signal may start to cross the roadway in the direction of the signal, but must complete the crossing prior to the display of the steady “DON'T WALK” or “WAIT” or approved “Upraised Hand” symbol when the “countdown” ends.

(3) A steady “DON'T WALK” or “WAIT” or approved “Upraised Hand” symbol or a flashing “DON'T WALK” or “WAIT” or approved “Upraised Hand” without a “countdown” signal indicating the time remaining for a pedestrian to cross the roadway means a pedestrian facing the signal shall not start to cross the roadway in the direction of the signal, but any pedestrian who started the crossing during the display of the “WALK” or approved “Walking Person” symbol and who has partially completed crossing shall proceed to a sidewalk or safety zone or otherwise leave the roadway while the steady “WAIT” or “DON'T WALK” or approved “Upraised Hand” symbol is showing.

(b)(1) A peace officer, as defined in Chapter 4.5 (commencing with Section 830) of Title 3 of Part 2 of the Penal Code, shall not stop a pedestrian for a violation of this section unless a reasonably careful person would realize there is an immediate danger of a collision with a moving vehicle or other device moving exclusively by human power.

(2) This subdivision does not relieve a pedestrian from the duty of using due care for their safety.

(3) This subdivision does not relieve a driver of a vehicle from the duty of exercising due care for the safety of any pedestrian within the roadway.