(a) A driver facing a steady circular yellow or yellow arrow signal is, by that signal, warned that the related green movement is ending or that a red indication will be shown immediately thereafter.
(b) A pedestrian facing a steady circular yellow or a yellow arrow signal, unless otherwise directed by a pedestrian control signal as provided in Section 21456, is, by that signal, warned that there is insufficient time to cross the roadway and shall not enter the roadway.
(c) (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 subdivision (b) 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.