California Code, Vehicle Code - VEH § 21059

Sections 21211,21650, 21660, 22502, 22504, and subdivision (h) of Section 22500 do not apply to the operation of a rubbish or garbage truck while actually engaged in the collection of rubbish or garbage within a business or residence district, if the front turn signal lamps at each side of the vehicle are being flashed simultaneously and the rear turn signal lamps at each side of the vehicle are being flashed simultaneously.

This provision does not apply when the vehicle is being driven to and from work, and it does not relieve the driver of the vehicle from the duty to drive with due regard for the safety of all persons using the highway or protect him or her from the consequences of an arbitrary exercise of the privilege granted.