Red-Light and Intersection Crashes in Utah: Proving Who Had the Right of Way

Short answer: In an intersection crash, fault usually turns on who had the right-of-way, and Utah’s traffic code spells that out for signals, stop signs, yield signs and four-way stops. The hard part is rarely the rule. It is proving which light each driver had, or who reached the stop sign first, when both drivers say they were in the right.

“The light was green” is the most common sentence in an intersection claim, and often both drivers say it. Here is what Utah law says about each kind of intersection and what evidence tends to break the tie.

Traffic Signals: What Each Light Means Under Utah Law

Utah’s traffic signal statute sets the rules at signalized intersections (Utah Code 41-6a-305):

• Steady red. A driver may not enter the intersection unless another indication permits the movement, and must stop at the marked stop line, or before the crosswalk if there is no line, and remain stopped until a signal allows the driver to go (41-6a-305(4)(a)).
• Green. A driver may proceed, but must still yield to vehicles and pedestrians lawfully within the intersection or an adjacent crosswalk when the signal changes (41-6a-305(2)(a)). A fresh green is not permission to hit someone still clearing the intersection.
• Steady yellow. A yellow warns that the green movement is ending (41-6a-305(3)(a)).
• Right on red. After stopping, a driver may cautiously turn right on a steady red, but must yield to vehicles moving through on their signal and to pedestrians in an adjacent crosswalk (41-6a-305(4)(c)).

Flashing signals have their own rule. A flashing red is treated like a stop sign, and a flashing yellow allows a driver to proceed only with caution (Utah Code 41-6a-307).

Utah law also requires enough room on the far side before entering. A driver may not enter an intersection or marked crosswalk unless there is space on the other side to get through without blocking traffic, even with a signal to proceed (Utah Code 41-6a-1707).

When the Signal Is Out

Power outages and malfunctions happen. A driver approaching an intersection with an inoperative signal must stop before entering and then yield under the same rules that govern an intersection with no signal (41-6a-305(6)). In practice, a dark signal works like a four-way stop.

Stop Signs and Yield Signs

At a stop sign, a driver must stop at the marked stop line, or before the crosswalk, or if neither is marked, at the point nearest the cross street where the driver can see approaching traffic. After stopping, the driver must yield to any vehicle in the intersection or approaching so closely that it is an immediate hazard (Utah Code 41-6a-902(2)).

That second part is where many two-way stop crashes are decided. Coming to a full stop does not end the duty. A driver who stops, then pulls into the path of cross traffic that did not have to stop, has usually failed to yield.

Yield signs carry a specific evidence rule. If a driver passes a yield sign without stopping and collides with a vehicle in the intersection or a pedestrian in an adjacent crosswalk, the collision is prima facie evidence that the driver failed to yield. The statute also says that collision is not negligence per se (41-6a-902(4)). In plain terms, the crash itself is evidence against the yielding driver, but it does not automatically decide fault.

Four-Way Stops and Uncontrolled Intersections

At an intersection controlled by stop signs from every direction, or one with no signs or signals at all, Utah’s rule works in two steps (Utah Code 41-6a-901):

1. A driver must yield to a vehicle that has already entered the intersection from a different road.
2. When two vehicles enter or approach from different roads at about the same time, the driver on the left yields to the driver on the right.

At an uncontrolled intersection, a driver on a road that ends at the intersection yields to traffic on the road that continues, and a driver on an unpaved road yields to traffic on a paved one (41-6a-901(3)).

These rules sound tidy, but four-way stop disputes often come down to who arrived first, which neither driver can prove by themselves.

How Fault Gets Divided

Intersection crashes often involve fault on both sides: one driver ran a stale yellow, the other started into the intersection before looking. Utah divides fault by percentage. You can recover from a defendant only if the combined fault of those assigned blame is greater than yours, and each defendant pays only its own share (Utah Code 78B-5-818; 78B-5-820). A driver found 50% or more at fault recovers nothing from the other side, which is why a “who had the light” dispute is worth fighting over carefully. See can I still recover if I was partly at fault in Utah.

Left turns at intersections follow their own yield rule, covered in our post on who is at fault in a left-turn crash in Utah.

Evidence That Shows Who Had the Right-of-Way

When both drivers claim the green, neutral evidence decides the case:

• Independent witnesses. A driver who was stopped at the cross street knows what color their own light was, which tells you what the other direction had. Pedestrians waiting to cross can do the same.
• Video. Dash cameras, business security cameras, doorbell cameras and cameras on buses or delivery vehicles. Many systems overwrite footage within days, so ask early.
• Signal timing. The city or state agency that runs the signal may have records of how it was programmed. Combined with video or witness timing, that can show which phase was showing.
• Vehicle event data. Many vehicles store speed, braking and throttle data from the seconds before a crash, which can show whether a driver stopped at a sign or was speeding up through a yellow.
• The physical scene. Where the cars came to rest and where each was damaged can support or undercut each driver’s account.

The police report records what the officer found, but officers usually arrive after the crash and do not see the light. Our guide to getting a Utah police crash report explains how to request it, and what evidence helps a car accident case covers the broader list.

After an Intersection Crash

Your own PIP coverage usually pays the first medical bills regardless of fault. Get names of anyone who stopped, note cameras on nearby buildings, and be careful about agreeing with the other driver’s version of the light at the scene or later to an adjuster.

Talk to a Utah Car Accident Attorney

When both drivers say the light was green, the claim usually goes to whoever gathers the better evidence first. A free case review can help you figure out what exists and how to get it.

Hurt in Utah? Call (801) 921-5134 or send us your case for a free consultation. No attorney fees unless we win. Hablamos Español.