Car Accidents at California Intersections — Who Had the Right of Way?

Intersection accidents — T-bones, red light runners, stop sign violations — are among the most common and most contested crash types in California. Both drivers often claim they had the right of way. Here's how California law determines who is at fault.

Traffic Signal Intersections

Running a Red Light (VC 21453)

A driver who enters an intersection on a red light is at fault for any resulting collision. This seems straightforward — but proving who had the green light is often contested when there are no witnesses or camera footage.

Evidence sources:

• Red light cameras (increasingly common at major intersections)
• Dashcam footage from either vehicle or nearby vehicles
• Business surveillance cameras
• EDR data showing vehicle speed and acceleration (approaching a green vs. red light produces different acceleration patterns)
• Signal timing data from the traffic management system
• Witness accounts

The Yellow Light Problem

California Vehicle Code § 21452 requires a driver facing a yellow signal to stop before entering the intersection if it can be done safely. A driver who speeds up to "beat the yellow" and enters on red is at fault. However, a driver already in the intersection when the light turns red is not violating the law.

Stop Sign Intersections (VC 21802)

At a two-way stop:

• The driver with the stop sign must yield to all vehicles on the through road
• If a vehicle runs a stop sign, they are at fault for any collision

At a four-way stop:

• The first vehicle to stop and then proceed has the right of way
• If two vehicles arrive simultaneously, the vehicle on the right has the right of way
• A vehicle making a left turn must yield to oncoming traffic even if they arrived first

Uncontrolled Intersections (No Signals or Signs)

California Vehicle Code § 21800 governs uncontrolled intersections:

• The driver on the left must yield to the driver on the right
• The first vehicle to enter the intersection has the right of way
• At T-intersections, the vehicle on the terminating road yields to traffic on the through road

Left Turn Accidents (VC 21801)

This is one of the most litigated intersection scenarios. A driver making a left turn must yield to:

• All oncoming traffic that is close enough to be a hazard
• Even vehicles that are technically speeding (the turning driver still had the obligation to yield)

Left-turning drivers are presumed at fault in most intersection T-bone accidents. The burden shifts to them to prove the oncoming driver was speeding excessively, ran a red light, or otherwise created the hazard.

Pedestrian Right of Way at Intersections

California Vehicle Code § 21950 requires drivers to yield to pedestrians in crosswalks — both marked and unmarked. A driver who strikes a pedestrian in a crosswalk bears strong presumptive fault. Even outside a crosswalk, a driver must exercise due care to avoid striking a pedestrian.

How to Prove Right-of-Way in a Disputed Case

• Request intersection camera footage immediately (typically overwritten in 30–72 hours)
• Canvass nearby businesses for surveillance cameras
• Get statements from witnesses at the scene before they leave
• Hire an accident reconstructionist to analyze physical evidence
• Subpoena city traffic signal timing data
• Obtain EDR data from both vehicles