Crosswalk Pedestrian Fault Determination: Signal Data, Delta-V, and Case Value

The Left-Turn Case That Turns on Two Seconds

You represent a 52-year-old woman struck in a marked crosswalk by a left-turning Chevy Tahoe. She has a comminuted tibial plateau fracture, a torn ACL, and two herniated discs at L4-L5 and L5-S1. The demand package is $1.4 million. Defense counsel's answer: she entered the crosswalk on a flashing don't-walk signal, and the driver had a green arrow.

Pedestrian hit by car at crosswalk fault determination cases like this one almost never come down to who's more believable on the stand. They come down to signal phase timing, vehicle speed at impact, and whether the physics match either party's story. When you have the signal data, you have the case. When you don't, you're asking a jury to pick sides.

This article walks through what actually determines fault and settlement value in crosswalk pedestrian strikes, from the signal controller cabinet to the biomechanical injury report you attach to the demand.

Signal Timing Is the First Piece of Physical Evidence

Every signalized intersection in the United States runs on a controller that logs phase changes. Many newer systems (Econolite, Intelight, McCain) log those changes with tenth-of-a-second timestamps. The data sits in the controller cabinet at the intersection, and it's overwritten on a cycle, sometimes within 48 hours, sometimes within 30 days. Your first move after signing the client is sending a spoliation letter to the municipality or DOT that owns the intersection.

The signal timing record tells you exactly when the pedestrian walk signal activated, how long the walk phase lasted, when the flashing don't-walk countdown began, and when the steady don't-walk (red hand) illuminated. It also tells you the corresponding vehicle phase: whether the left-turn lane had a protected green arrow, a permissive green, or a red.

In our hypothetical, the signal timing log shows the pedestrian walk phase started at 14:32:07.4 and the flashing don't-walk began at 14:32:22.4. That's a 15-second walk phase. The left-turn arrow for the opposing lane went green at 14:32:26.1, nearly four seconds after the walk phase ended. If your client entered the crosswalk at the start of the walk signal, she had every right to be there. If the driver claims he had a green arrow, the signal data says he's wrong by at least four seconds.

Four seconds matters. At 22 mph, a vehicle covers about 129 feet in four seconds. That's the distance between "I had the right of way" and "I didn't."

Vehicle Speed Reconstruction in Pedestrian Strikes

Pedestrian crash reconstruction is different from vehicle-to-vehicle work. There's no crumple zone absorbing energy on both sides. The pedestrian's body is the crumple zone. That makes speed estimation both more important and more dependent on physical evidence at the scene.

You're looking at four inputs: throw distance (how far the pedestrian was projected from the point of impact), vehicle damage profile (hood deformation, windshield contact point, A-pillar damage), surveillance or dashcam video if it exists, and the vehicle's event data recorder. NHTSA's EDR requirements under 49 CFR Part 563 mandate pre-crash speed logging in most passenger vehicles manufactured after 2012. If the Tahoe has a readable EDR, you'll get throttle position, brake application timing, and vehicle speed at up to five seconds before impact.

When EDR data isn't available, throw distance combined with pedestrian mass gives you a reliable speed estimate. The Searle equation, widely used and Daubert-tested, calculates vehicle impact speed from the distance the pedestrian traveled after being struck. A throw distance of 45 feet with a 155-pound pedestrian puts the vehicle speed around 22 to 25 mph. That's not a guess. It's Newtonian mechanics.

Silent Witness generates this speed range from scene photos and the damage profile, cross-referenced against the vehicle's frontal geometry. You can run it through the free Delta-V calculator to see a preliminary estimate before committing to a full report.

Why Pedestrian Biomechanics Change the Injury Argument

Here's where crosswalk cases diverge from the typical rear-end BI claim. In a vehicle-to-pedestrian impact, the injury pattern is almost entirely predictable from the vehicle's frontal profile height and the pedestrian's stature. A Chevy Tahoe has a hood leading edge at roughly 42 inches. Your client is 5'4". The bumper contacts her leg below the knee. The hood edge strikes her at the pelvis. Her upper body rotates onto the hood, and her head contacts the windshield or A-pillar.

That sequence predicts exactly the injuries she has. The tibial plateau fracture comes from the bumper strike below the center of mass. The lumbar herniations come from the rotational acceleration as her torso wraps the hood. The ACL tear is a secondary injury from the leg's lateral displacement at the moment of bumper contact.

"In pedestrian impacts, the vehicle's frontal geometry is a better predictor of injury pattern than speed alone. A sedan at 30 mph and an SUV at 20 mph produce completely different injury profiles on the same pedestrian." - Senior biomechanical engineer, SAE-certified reconstructionist

This biomechanical mapping matters for two reasons. First, it connects every injury in the medical records directly to the crash mechanism, which defeats the defense IME doctor who wants to attribute the lumbar herniations to "pre-existing degenerative changes." Second, it gives you AIS severity scores for each injury. A comminuted tibial plateau fracture is AIS 3. Lumbar disc herniations with radiculopathy are AIS 2. An ACL tear is AIS 2. When you stack those scores, you're looking at an Injury Severity Score (ISS) in the range of 13 to 17, which places your client in the "moderate to serious" category on any carrier's severity scale.

This is the kind of analysis where Silent Witness's biomechanical injury report changes the trajectory of a case. Instead of arguing over MRI interpretations with a defense orthopedist, you hand the adjuster a physics-based causation chain: vehicle speed, contact geometry, occupant kinematics, predicted injury pattern, actual injury pattern. The match is the argument.

Comparative Fault and the Pedestrian's Conduct

Defense counsel in crosswalk pedestrian cases almost always raises comparative fault. The playbook is familiar: the pedestrian was distracted by a phone, entered the crosswalk late, was wearing dark clothing, or failed to make eye contact with the turning driver. In pure comparative fault states (California, New York, Florida post-2023 at 51% bar), even 20% fault on the pedestrian reduces recovery by 20%.

Signal timing data is your best weapon against speculative comp fault arguments. If the signal log shows your client entered during the walk phase, the "she entered late" argument collapses. If surveillance video shows her looking left before stepping off the curb, the distraction argument collapses.

But there are cases where the pedestrian does bear some fault, and you need to know the number before the defense names it. NHTSA's Pedestrian Safety Report (DOT HS 813 458, 2023) found that in 27% of fatal pedestrian crashes at signalized intersections, the pedestrian had entered against the signal. Adjusters and defense attorneys know this statistic. If your client entered during the flashing don't-walk countdown, you're probably looking at 10 to 25% comparative fault depending on jurisdiction. That's the difference between a $1.4M demand and a $1.05M to $1.26M realistic settlement range.

You need to price that exposure before mediation. A crash reconstruction report that maps the signal phase against the pedestrian's likely crossing time, calculated from the point of impact and an average walking speed of 3.5 ft/s, gives you a defensible position on exactly when she entered the crosswalk. No speculation. Measured gait speed against measured distance.

Building the Demand Package With Physics

The strongest crosswalk pedestrian demand packages share a structure. Lead with the signal timing data. Follow with the speed reconstruction. Then present the biomechanical injury causation chain. Attach the medical records and life care plan last, after you've already established that every injury is mechanistically explained by the crash.

Most PI attorneys handling pedestrian cases send the demand with a narrative and hope the adjuster reads the medical records carefully. The better approach is to make the physics do the arguing. When your demand includes a Delta-V estimate of 22 mph, a pedestrian throw distance of 45 feet, an AIS injury severity breakdown, and a signal phase analysis showing your client was lawfully in the crosswalk, you've preempted every MIST-style defense before it's raised.

MIST defenses (minor impact, soft tissue) don't apply to pedestrian strikes in the same way they apply to low-speed rear-ends, but carriers still try. They'll point to the "low" vehicle speed and argue the injuries are disproportionate. A 22 mph pedestrian impact produces a Delta-V to the pedestrian's body that is dramatically higher than a 22 mph vehicle-to-vehicle rear-end, because there's no vehicle structure absorbing the energy. The pedestrian absorbs nearly all of it. A biomechanical report quantifying that energy transfer, with g-force profiles at the point of body contact, shuts down the disproportion argument with math.

What Gets Left on the Table

The cases that settle below value in this category almost always share the same gap: the attorney relied on the police report's speed estimate and the treating physician's narrative, without independent reconstruction. Police reports in pedestrian cases routinely underestimate vehicle speed. Officers arrive after the fact, measure skid marks (if any), and apply a drag-factor formula that doesn't account for ABS-equipped vehicles that leave minimal tire marks.

Treating physicians document injuries. They don't document causation. An orthopedic surgeon's note that says "tibial plateau fracture consistent with blunt force trauma" doesn't tell the adjuster anything about the crash mechanism. A biomechanical report that says "the Tahoe's bumper contacted the left proximal tibia at 22 mph, producing a lateral bending moment of approximately 380 Nm, exceeding the 270 Nm fracture threshold for cortical bone in a 52-year-old female" tells the adjuster everything.

That's the difference between a demand that gets countered at 40 cents on the dollar and one that gets countered at 75.

If you want to see how a specific crosswalk impact scores, the free Delta-V calculator takes scene photos and about two minutes.

Frequently Asked Questions

Who is at fault when a pedestrian is hit by a car at a crosswalk?

Fault depends on signal phase data, vehicle speed, and the pedestrian's conduct at the time of the impact. If signal timing records show the pedestrian entered during the walk phase and the driver violated a red or failed to yield on a permissive turn, the driver bears primary or full liability. Comparative fault may apply if the pedestrian entered against the signal or was distracted.

How does traffic signal data affect a pedestrian accident settlement?

Signal timing logs provide tenth-of-a-second records of when walk, don't-walk, and vehicle phases activated. This data can prove or disprove both parties' accounts of who had the right of way, often eliminating credibility disputes entirely. Cases with clear signal data favoring the pedestrian settle at significantly higher multiples than cases without it.

What is the average settlement for a pedestrian hit in a crosswalk?

Settlement value depends on injury severity (AIS score), liability clarity, comparative fault percentage, and available policy limits. A pedestrian with AIS 2-3 injuries (fractures, disc herniations, ligament tears) struck by a driver who violated a signal in a no-comp-fault scenario typically sees settlements in the range of $350,000 to $1.5 million, depending on jurisdiction and long-term treatment needs.

Can a pedestrian be at fault for being hit in a crosswalk?

Yes. NHTSA data shows 27% of fatal pedestrian crashes at signalized intersections involved the pedestrian entering against the signal. Entering during a flashing don't-walk countdown, being distracted, or darting into traffic can all support comparative fault findings. The percentage of fault assigned varies by state comparative fault rules, from pure comparative (recovery reduced by fault percentage) to modified comparative (recovery barred above 50% or 51% fault).

How is vehicle speed determined in a pedestrian accident?

Vehicle speed in pedestrian strikes is calculated using throw distance (the Searle equation), vehicle EDR data when available, surveillance video analysis, and vehicle damage profiling. The Searle equation uses the distance the pedestrian was projected after impact, combined with pedestrian mass and friction coefficients, to calculate impact speed. This method is widely accepted under Daubert and Frye standards.

This content is for informational purposes and does not constitute legal or medical advice.