Left-Turn Accident in California: Who Is at Fault

You were driving straight through an intersection and a car turned left across your lane. Or you were the one turning, you thought the gap was clear, and the other car came out of nowhere. Either way, both insurers are now telling different stories about who had the right-of-way.

The common belief is that the left-turning driver is always at fault. Usually that driver is, but California law does not say "always," and the details of the light, the timing, and the other car's speed can move the answer. This post walks through the rules, the arguments each side makes, and the evidence that decides it.

The rule that puts the turning driver on the hook

Vehicle Code § 21801(a) is the starting point. A driver intending to turn left, make a U-turn, or turn left into a driveway or alley "shall yield the right-of-way to all vehicles approaching from the opposite direction which are close enough to constitute a hazard at any time during the turning movement."

Notice the phrase "at any time during the turning movement." It is not enough that the road looked clear when the turn started. The turning driver has to keep yielding "until the left turn or U-turn can be made with reasonable safety."

Vehicle Code § 22107 adds a general rule for every turn: no one may turn from a direct course until the movement "can be made with reasonable safety," and only after giving an appropriate signal. Under § 22108, that signal has to be given continuously during the last 100 feet before the turn.

When a driver breaks one of these rules and causes exactly the kind of crash the rule was written to prevent, Evidence Code § 669 presumes that driver failed to use due care. A left turn into oncoming traffic is the textbook example. We covered how that presumption works in rear-end collisions, and the logic here is the same.

The part of § 21801 insurers skip

Subdivision (b) of the same statute runs the other way. Once a turning driver has yielded as required and signaled, that driver "may turn left," and the oncoming drivers "shall yield the right-of-way to the turning vehicle."

In plain terms, the right-of-way can shift. If the turning driver waited, signaled, and started the turn when no oncoming car was close enough to be a hazard, a driver who then comes into the intersection too fast or too late may be the one who failed to yield.

So the real question in most left-turn cases is not "who was turning?" It is "how close was the oncoming car when the turn started, and how fast was it going?"

How the traffic signal changes the analysis

The color of the light matters a great deal, and people often misremember it.

• Solid green ball. Under Vehicle Code § 21451(a), a driver facing a circular green may turn left, but "shall yield the right-of-way to other traffic." This is an unprotected turn. Oncoming traffic has a green too.
• Green arrow. Under § 21451(b), a green arrow allows the indicated movement. The DMV Driver Handbook calls it a protected turn and says oncoming vehicles are stopped by a red light. If you turned on a green arrow and an oncoming driver hit you, that driver likely ran a red.
• Flashing yellow arrow. The Handbook says you can turn, "but your turn is not protected from other traffic," and you must yield to oncoming traffic first. Treat it like a green ball, not a green arrow.
• Yellow. Vehicle Code § 21452 says a yellow only warns that the green movement is ending or that a red will follow. For a turning driver, the Handbook says a yellow arrow means "the protected turning time is ending," and if you are already in the intersection, "cautiously complete your turn."

The yellow-light trap

Here is a common version. You pull into the intersection on a green ball to wait for a gap. Oncoming traffic never lets up. The light goes yellow, and you start your turn to clear the intersection. An oncoming driver who decided to beat the light hits you.

The insurer for the oncoming driver will say you failed to yield under § 21801. Your answer is that the oncoming driver was facing the same yellow, and possibly a red by the time of impact. A yellow is a warning to stop if it is safe to do so, not an invitation to speed up. The Handbook tells drivers facing a solid yellow to stop "if you can do so safely."

Timing decides these cases. A few seconds of dashcam video, or the signal timing records from the city, can matter more than anything either driver says afterward.

What the other side will argue

If you were the one going straight:

• "You were speeding." Vehicle Code § 22350 bars driving faster than is reasonable or prudent for traffic, weather, and visibility. If you were well over the limit, the turning driver will argue that the gap they saw was safe for a car traveling at a normal speed.
• "You ran the yellow or red." Expect questions about exactly what color your light was when you entered.
• "You were distracted." A phone in your hand becomes their exhibit.

If you were the one turning:

• "You turned right in front of me." This is the default argument, and § 21801(a) backs it.
• "You didn't signal." Under § 22108 the signal belongs in the last 100 feet, not halfway through the turn.
• "Someone waved you through." Drivers in the opposing left-turn lane or a stopped lane sometimes wave a turning driver across. A wave does not clear the lane beyond that driver. Relying on it is a common way to get hit by a car in the next lane.

None of these ends a claim on its own. Each is a question of fact.

What this means in California

• Two years. The personal injury statute of limitations under Code of Civil Procedure § 335.1 is generally two years from the date of the crash.
• Six months for public entities. If a city vehicle, public bus, or other government vehicle was involved, or if you believe a signal or intersection design was dangerous, a government claim is usually due within six months.
• Shared fault reduces, it does not bar. California follows pure comparative negligence. A turning driver who is found mostly at fault can still recover a share from an oncoming driver who was speeding, and the reverse is also true.

The evidence that decides left-turn cases

• Dashcam and nearby video. Businesses near busy intersections may have cameras, and some systems overwrite footage quickly. Ask early, in writing.
• Photos of where the cars came to rest and where the damage is. Damage to the front of one car and the side of the other tells a story about who was where.
• Witness names. A driver who was stopped at the cross street saw the light. Get their contact information before they leave.
• The police report number. The report will not settle fault in a civil claim, but it records statements while they are fresh.
• Your own medical records from day one. A delay in treatment will be used against you no matter who had the right-of-way. Our checklist on the first hours after a car accident covers what to do at the scene.

Practical next steps

Write down what you remember about the light, the timing, and the other car before anyone asks you, and keep it to yourself. When an adjuster calls asking what color the light was or how fast you were going, do not estimate on a recorded line; our post on recorded statement traps explains what those calls are built to produce. Get treated, keep your appointments, and save every photo and video in more than one place. If you want someone to look at how fault is likely to be argued in your crash, a consultation with our firm is free and there is no fee unless there is a recovery.