Intersection accidents in California

Intersections concentrate every conflict a road has into one small square: crossing paths, turning paths, pedestrians, cyclists, and a set of rules that only work if everyone reads them the same way. When two drivers each believe they had the right of way, one of them is wrong, and the job is working out which. This is general information, not legal advice.

Signals

A driver facing a steady circular red must stop at the limit line, or before the crosswalk if there is no limit line, or at the entrance to the intersection, and stay stopped until an indication to proceed. The exception is the right turn on red, and a left turn from a one-way onto a one-way, which are permitted unless a sign prohibits them and only after yielding to pedestrians and approaching traffic.

That last clause gets skipped. A right turn on red is a yield, not a free pass, and a driver who rolls into a turn without stopping first has violated the rule even if the way looked clear.

Sources: Veh. Code, § 21453 (steady circular red; right turn on red after stopping and yielding).

Stop signs

A driver approaching a stop sign must stop at the limit line if there is one, otherwise before entering the crosswalk on the near side, and if there is neither, at the entrance to the intersecting roadway. The stop is required regardless of whether anyone else is present.

After stopping, priority follows arrival: first to stop goes first. When two vehicles arrive together, the driver on the left yields to the driver on the right. Most four-way stop collisions come from one driver treating the stop as a slow roll and misjudging whose turn it was.

Sources: Veh. Code, § 22450 (stop at a limit line, crosswalk, or the entrance to the intersecting roadway).

Uncontrolled intersections

Plenty of residential intersections have no signal and no sign in any direction. The yield-to-the-right rule applies when two vehicles arrive at about the same time, but the more important duty is the general one: a driver must keep a lookout and control the speed and movement of the vehicle. Approaching an intersection you cannot see into, at a speed that does not allow stopping, is negligent whether or not a sign says so.

Sources: CACI No. 700 (basic standard of care in driving — the common-law duty that applies where the Vehicle Code does not), Judicial Council of California Civil Jury Instructions (2026 edition).

Resolving the who-had-the-light dispute

This looks unresolvable and usually is not. What settles it, roughly in order of weight:

• Independent witnesses. A person with no stake, found at the scene, outweighs both drivers. This is the single strongest reason to collect names before people leave.
• Video. Intersection cameras, buses, businesses on the corner, doorbell cameras, and dash cameras. Most of it overwrites within days, which makes speed of request the whole game.
• Signal timing. Phases and intervals are fixed and documented. If one driver's account requires an impossible overlap, the timing plan says so.
• Point of impact. Where each vehicle was struck, and how far into the intersection, constrains who entered when.
• Event data recorders. Pre-impact speed and braking from either vehicle.

In detail: how fault is decided · how to read a traffic collision report.

When the intersection itself is the problem

Some intersections generate collisions at a rate the drivers do not explain. A hedge or parked truck that blocks the sight triangle, a signal stuck on a phase, a stop sign knocked down and not replaced, faded markings. A public entity can be responsible for a dangerous condition of its own property where it created the condition or had notice of it in time to fix it.

That route has its own deadline, and it is short.

Sources: Gov. Code, § 835 (public entity liability for a dangerous condition of public property).

Common questions

It is my word against theirs about the light. Is the case hopeless?

No. These disputes are resolved more often than people expect, and rarely by whose account sounds better. Signal timing plans, independent witnesses, camera footage, event data recorders, and the physical evidence of where each vehicle was struck all narrow it.

Who has the right of way at a four-way stop?

Every driver must stop. After stopping, the driver who arrived first goes first. If two arrive at about the same time, the driver on the left yields to the driver on the right. Rolling through a stop is a violation whether or not anyone else is there.

What if the intersection has no signs or signals at all?

The same yield-to-the-right rule applies when two vehicles arrive at roughly the same time, and every driver still owes ordinary care — approaching at a speed that allows stopping and looking before entering. Uncontrolled intersections in residential areas produce a lot of claims for exactly that reason.

Can the city be responsible for the intersection itself?

Sometimes. A public entity can be liable for a dangerous condition of its property, which can include an obstructed sight line, a malfunctioning signal, or missing signage. That claim runs on a much shorter deadline than an ordinary claim, so it has to be identified early.