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By David Gammill · Last reviewed: August 20, 2026
Vehicle Code § 22350 is California’s basic speed law. It makes one rule the master of every posted speed limit: you may never drive faster than is safe for the conditions around you, and you may never drive at a speed that endangers people or property. That means a driver doing 30 miles per hour in a 45 zone can still be violating California’s speed law. After a crash, this one sentence of law often decides who was at fault.
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The section is one sentence, quoted here in full:
No person shall drive a vehicle upon a highway at a speed greater than is reasonable or prudent having due regard for weather, visibility, the traffic on, and the surface and width of, the highway, and in no event at a speed which endangers the safety of persons or property.
Source: Cal. Veh. Code § 22350, California Legislative Information (verified August 20, 2026).
In plain English: the law does not just set number limits and walk away. Every driver, on every road (“highway” in the Vehicle Code means any public road, not just freeways), must match their speed to what is actually happening around them: the rain, the fog, the traffic, the width and condition of the pavement. And the last clause is absolute: whatever the conditions, no one may drive at a speed that endangers people or property.
Yes. This is the point most drivers miss, and it decides real cases. The posted limit is a ceiling for good conditions, not a guarantee of safety in all conditions. A companion statute, Vehicle Code § 22351(a), says speed under the applicable limit is lawful “unless clearly proved to be in violation of the basic speed law.” So the door stays open: with proof, a driver doing 40 in a 45 zone in heavy rain, or crawling through fog with no visibility of the lane ahead, or weaving through thick traffic, can be found in violation of § 22350 even though no radar gun would ever have flagged them.
For crash victims this matters enormously. Insurance adjusters like to say “our insured was under the limit, so speed was not a factor.” California law says otherwise. The question is never only the number on the sign; it is whether the speed was safe for the conditions that existed at that moment.
The presumption flips. Under Vehicle Code § 22351(b), speed over the applicable limit is “prima facie unlawful,” which means it is treated as a violation unless the driver proves, with real evidence, that going that fast was safe at that time and place under those conditions. That is a hard thing to prove after a crash has already happened.
One honest nuance, because California law includes it: in a civil lawsuit, Vehicle Code § 40831 says that proof a driver exceeded a prima facie speed limit “does not establish negligence as a matter of law.” The victim still has to show, as a fact, that the excess speed was negligent under the circumstances. In practice that showing is usually the natural next step: the same evidence that proves the speed (skid marks, crash physics, the car’s own recorded data) also shows why that speed was dangerous on that road at that moment.
California’s negligence per se rule, Evidence Code § 669, presumes a driver failed to use due care when four things are true: they violated a statute; the violation caused death or injury; the harm was the kind the statute was designed to prevent; and the person hurt was among the people the statute was designed to protect. The basic speed law exists precisely to protect people on and near the road from unsafe speed. So when the evidence shows the other driver violated § 22350, and that unsafe speed caused your crash, the law presumes they were negligent, and the burden shifts to them to explain themselves.
Speed also shapes cases where the other driver’s violation is disputed. Under California’s pure comparative negligence rule, fault is divided in percentages, and every percentage point matters to the final recovery. Proving the other driver was going too fast for conditions, even modestly, moves those percentages. That proof comes from physical evidence: the crash physics, roadway evidence, camera footage, witness accounts, and the event data recorder that most modern cars carry, which records speed and braking in the seconds before impact. Our guide to speeding accident claims in Torrance covers how that evidence gets gathered and used.
The classic § 22350 crash is not a drag race. It is ordinary driving that ignored conditions: too fast on rain-slick pavement, too fast approaching stopped traffic, too fast through a narrow or crowded corridor. Rear-end collisions are the most common result, because a following distance that works at a safe speed fails at an unsafe one; our Torrance rear-end accident guide explains how the two rules work together. The same logic applies to crashes at intersections, in parking lots and school zones, and on wet winter freeways where drivers keep summer speeds.
Unsafe speed is a measurable local problem. In 2023, 70 of Torrance’s fatal and injury crashes were speed-related, out of the 647 people killed or injured in the city’s traffic collisions that year (California Office of Traffic Safety, Torrance 2023 crash rankings, built from SWITRS, the state’s collision database). The corridors where Torrance drivers see it daily are the obvious ones: Hawthorne Boulevard and Pacific Coast Highway signal-to-signal traffic, Sepulveda and Crenshaw, and the transitions where the 405 and 110 dump freeway speeds onto surface streets. The basic speed law applies identically on every one of them.
A basic speed law violation is proven inside your underlying injury case, so the usual clocks govern: most California injury lawsuits must be filed within two years under CCP § 335.1, California’s two-year statute of limitations, and if a public entity or dangerous road condition is involved, a written government claim is due within six months under the government claim deadline. Speed evidence has its own, shorter clock: event data gets overwritten when cars are repaired or salvaged, and corridor camera footage is often gone within days.
Yes. The text quoted above reflects California law as of the review date at the top of this page, verified against the official California Legislative Information site and independent mirrors. Section 22350 has been unchanged since 1963, which is part of why it is so deeply built into how California crash cases are decided.
Speed evidence is strongest when someone moves to preserve it early. If you were hurt in a crash in Torrance or the South Bay and you believe the other driver was going too fast, for the limit or for the conditions, start with our Torrance speeding accident page or our Torrance car accident attorney page. Get your free case evaluation or call 310-750-4149. There are no upfront legal fees; a fee is collected only if we win, under a written contingency fee agreement that complies with California law.
Disclaimer: This article is educational and informational in nature. It does not constitute legal advice for any specific situation, and reading it does not create an attorney-client relationship. Every case turns on its own facts, and no result is guaranteed; consult a licensed California attorney about your own circumstances.
