Vehicle Code section 21454

When lane use control signals are placed over individual lanes, those signals shall indicate and apply to drivers of vehicles as follows:

(a)

Green indication: A driver may travel in any lane over which a green signal is shown.

(b)

Steady yellow indication: A driver is thereby warned that a lane control change is being made.

(c)

Steady red indication: A driver shall not enter or travel in any lane over which a red signal is shown.

(d)

Flashing yellow indication: A driver may use the lane only for the purpose of making a left turn to or from the highway.

Source: Section 21454, https://leginfo.­legislature.­ca.­gov/faces/codes_displaySection.­xhtml?lawCode=VEH§ionNum=21454.­ (updated Jan. 1, 1981; accessed Jul. 14, 2025).

Green check means up to date. Up to date

Verified:
Jul. 14, 2025

§ 21454's source at ca​.gov