Cal. VEH § 36509
This is the official text of Cal. VEH § 36509, part of California’s Vehicle Code — governs traffic laws, driver's licenses, and vehicle registration.
Not legal advice. This page reproduces the official text of a government statute for reference only. Laws change, and how a statute applies depends on your specific facts. For advice about your situation, consult a licensed attorney in your state.
Official statutory text
(a) An implement of husbandry, a farm vehicle, or any vehicle escorting or towing an implement of husbandry or farm vehicle, may display flashing amber warning lamps or flashing amber turn signals:
(1) When the vehicle is required to display a “slow moving vehicle” emblem as defined in Section 24615.
(2) When the width, length, height, or speed of the vehicle may cause a hazard to other traffic on the highway.
(b) An implement of husbandry, a farm vehicle, or any vehicle towing an implement of husbandry or farm vehicle, when the load upon the vehicle exceeds 120 inches in width, shall display either:
(1) Flashing amber warning lamps.
(2) Flashing amber turn signals.
(3) During daylight hours, red flags, each of which shall be not less than 16 inches square, mounted at the left and right outer extremities of the vehicle or load whichever has the greater horizontal dimension.
(1) When the vehicle is required to display a “slow moving vehicle” emblem as defined in Section 24615.
(2) When the width, length, height, or speed of the vehicle may cause a hazard to other traffic on the highway.
(b) An implement of husbandry, a farm vehicle, or any vehicle towing an implement of husbandry or farm vehicle, when the load upon the vehicle exceeds 120 inches in width, shall display either:
(1) Flashing amber warning lamps.
(2) Flashing amber turn signals.
(3) During daylight hours, red flags, each of which shall be not less than 16 inches square, mounted at the left and right outer extremities of the vehicle or load whichever has the greater horizontal dimension.
Status: in_force · Read it on the official government site
Need a lawyer in California?
Find a California lawyer
About this page: Statute text is reproduced from official government publishers via the
Open US Law dataset
(Vaquill AI, snapshot v2026.08, CC BY 4.0). Primary legislative text like this is public domain under the government-edicts doctrine
(Georgia v. Public.Resource.Org, 2020). We link every section back to its official source so you can verify it independently.