Vehicle Code section 24617
(a)
A transit bus may be authorized to be equipped with a yield right-of-way sign on the left rear of the bus. The yield right-of-way sign may flash simultaneously with the rear turn signal lamps, but is not required to do so. The sign may also be a static decal that is affixed to the left rear of the bus. If the sign is a flashing light-emitting diode (LED) sign, it shall be both of the following:(1)
Designed to warn a person operating a motor vehicle approaching the rear of the bus that the bus is entering traffic.(2)
Illuminated by a red flashing light when the bus is signaling in preparation for entering a traffic lane after having stopped to receive or discharge passengers.(b)
This section does not require a transit agency to install the yield right-of-way sign described in subdivision (a).(c)
This section does not relieve the driver of a transit bus from the duty to drive the bus with due regard for the safety of all persons and property. This section does not exempt the driver of a transit bus from Section 21804.(d)
This section applies only if the governing board of the transit agency approves a resolution, after a public hearing on the issue, requesting that this section be made applicable to it.(e)
A participating transit agency shall undertake a public education program to encourage motorists to yield to a transit bus when the sign specified in subdivision (a) is activated.
Source:
Section 24617, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=VEH§ionNum=24617. (accessed May 19, 2025).