A failure-to-yield violation under Vehicle Code 21800 governs right-of-way at intersections, and like other minor traffic violations it can become the stated basis for a DUI stop. I am Joel Brand, and here is what the statute requires and how it factors into a DUI.
The text of the law
Vehicle Code 21800. (a) The driver of a vehicle approaching an intersection shall yield the right-of-way to any vehicle which has entered the intersection from a different highway. (b)(1) When two vehicles enter an intersection from different highways at the same time, the driver of the vehicle on the left shall yield the right-of-way to the vehicle on his or her immediate right, except that the driver of any vehicle on a terminating highway shall yield the right-of-way to any vehicle on the intersecting continuing highway. (2) For the purposes of this section, "terminating highway" means a highway which intersects, but does not continue beyond the intersection, with another highway which does continue beyond the intersection.
What the statute requires
Section 21800 sets the right-of-way rules at intersections not controlled by signals or signs. The driver who already entered the intersection has the right of way, and when two vehicles arrive at about the same time, the driver on the left yields to the driver on the right, with a special rule for "T" intersections where a terminating highway meets a continuing one. A violation is an infraction that adds one point to your record under the DMV point system. The companion statute, Vehicle Code 21801, covers the related duty to yield when turning left across approaching traffic, and the two are often confused in citations.
Right-of-way is often genuinely ambiguous
The defining feature of these cases is ambiguity. Who entered the intersection first, who arrived "at the same time," and who actually had the right of way are frequently matters of honest disagreement, decided in a fraction of a second and reconstructed afterward from imperfect memories. That uncertainty is important, because a violation that cannot be clearly established is a shaky foundation for anything built on top of it.
Why it matters in a DUI
In a DUI, an officer may cite a failure-to-yield violation as the reason for the stop, or point to it as evidence of supposedly impaired driving. But a momentary right-of-way misjudgment is something sober drivers do routinely, and it is not proof of impairment. The two questions, whether you committed a traffic violation and whether you were impaired, are separate, and each requires its own proof.
Challenging the stop
As with any traffic-based DUI stop, the threshold question is whether the officer had a lawful basis to pull you over. If the failure-to-yield claim does not hold up, or the right-of-way facts are too murky to establish a clear violation, I can challenge the stop with a motion to suppress under Penal Code 1538.5. A successful motion can exclude the evidence that followed and unravel the DUI, because the lawfulness of the stop is the threshold question on which everything else depends.
When there was a collision
Failure-to-yield citations often arise out of an intersection accident, which adds a layer. If there was a collision, the question of who actually had the right of way becomes both a traffic-law issue and a fault issue, and an accident-reconstruction analysis can tell a very different story than the responding officer's first impression. Fault for the accident is also separate from impairment, and I keep the two from being conflated, since a driver can be faultless in the crash and still be wrongly assumed impaired, or at fault in the crash yet not impaired at all.
Points, fines, and the record
As a standalone infraction, failure to yield carries a fine plus assessments and one point. On its own that is minor, but combined with a DUI it adds to your record and can be addressed as part of the overall resolution. Keeping the point off matters for insurance and for the DMV's negligent-operator thresholds, which is one more reason not to simply pay the ticket when a DUI is attached.
A single misjudgment is not impairment
Prosecutors sometimes lean on a right-of-way error to suggest the driver was impaired. That inference is weak. Misjudging who had the right of way at an uncontrolled intersection is one of the most common mistakes sober drivers make, especially at unfamiliar or poorly marked intersections. It says nothing, by itself, about alcohol. I make sure a momentary yield error is treated as exactly that, rather than allowed to stand in for the proof of impairment the prosecution must establish through the chemistry and the field evidence.
How these cases resolve
On its own, a failure-to-yield infraction is a minor part of a combined case. The realistic goals are to keep the point off your record, to dismiss the infraction where the right-of-way facts are genuinely disputed, and to fold it into the overall resolution of the DUI so it carries no separate consequence. Where the citation arose from a collision, resolving any restitution can also help. As with every part of a DUI, how the yield count is handled depends on the strength of the rest of the case, which is why I look at all of it together.
How it fits the larger defense
The failure-to-yield issue is one piece of attacking the lawfulness of the stop, the most powerful category of DUI defense. It works alongside challenges to the field sobriety testing and the chemical evidence. See my top DUI defenses and the related yield rule in VC 21801.
Stopped for failure to yield and arrested for DUI? Let's talk.
Whether that stop was lawful may well be the central question in your case, and it is exactly what I review. Use the free case analysis on this page, or call me directly at (888) 271-6644. I answer my own phone, 24 hours a day, 7 days a week, and the first call is free.