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If you were hit in a Phoenix construction zone, the fault picture is almost never as simple as the other driver’s insurance wants you to believe. Work-zone crashes can involve the driver who hit you, the contractor running the project, an ADOT subcontractor, and sometimes all three at once. This article walks through how Arizona law actually splits fault in these cases, why the 180-day government notice rule kills more claims than people realize, and what to do in the first 48 hours after a crash. If you’re sorting through what happened on the Broadway Curve, the Loop 101 widening, or any other Phoenix work zone, this is the practical guide.
We handle these cases as part of our broader Phoenix car accident representation, and construction zones are one of the areas where the analysis differs sharply from a standard rear-end claim.
Phoenix has been under near-constant freeway construction for years. ADOT crash data and project documentation identify the I-10 Broadway Curve Improvement Project corridor, the Stack Interchange (I-10/I-17), and the Mini-Stack (I-10/SR-202) as recurring work-zone crash sites. On the Loop 101, the widening segments and the Bell Road, Northern Avenue, and Indian School Road interchanges all show elevated work-zone crash rates in ADOT reporting.
A few things make these areas dangerous:
Add in impaired driving (we see plenty of cases where the at-fault driver blew through a posted work zone at full speed) and you have the conditions for serious injury crashes at relatively low impact speeds.
Federal Highway Administration work-zone safety material describes the same crash types we see in Phoenix files:
Rear-end crashes deserve a closer look because of how Arizona handles fault.
Arizona follows pure comparative negligence under A.R.S. § 12-2505. Apportionment of fault is decided case by case, but Arizona’s rules of the road and decades of case law generally treat the following driver as the party most likely to be found at fault in a rear-end crash. Following too closely, distracted driving, and unjustified sudden stops are the recurring fact patterns in this category, and impact speeds are often well below highway speed because traffic has already slowed for the lane closure. Even relatively low-speed impacts can produce whiplash (medically, cervical acceleration-deceleration injury), herniated discs, soft tissue injuries, traumatic brain injury, or facial trauma from airbags.
“Likely to be found at fault” isn’t “automatically at fault.” If the lead driver made an unjustified sudden stop, or had no working brake lights, comparative fault can be assigned to them. In a work zone, the lead driver may have stopped because of an unmarked or poorly marked lane closure, which can pull the contractor into the fault analysis too. Rear-end liability is something we cover in more depth in our broader car accident content, and the work-zone setting layers extra parties on top of the standard analysis. The following driver isn’t always on the hook for 100% of the damages.
The driver who hit you is rarely the only person who could be liable. Plenty of work-zone summaries treat fault as a binary driver question. In real cases, it isn’t.
The other driver. Most of the time, yes. Speeding through a reduced limit, following too closely, or driving distracted is straightforward negligence. Impaired drivers blowing through a posted work zone are a recurring fact pattern, and drunk driving cases carry their own punitive damages exposure.
The construction contractor. Negligence theories include:
If a contractor’s traffic control plan didn’t match what was actually installed on the road that day, that’s a documented negligence claim.
ADOT or a public entity. When the project is publicly contracted (the Broadway Curve project, for example, is an ADOT project), the state agency or its subcontractors can be on the hook for design defects, inadequate oversight, or unsafe project specifications.
A commercial driver and the trucking company. If a semi rear-ended you because the driver couldn’t stop a fully loaded rig in the available distance, federal rules under 49 CFR § 387.9 set a minimum financial responsibility of $750,000 for most for-hire interstate carriers of non-hazardous property in vehicles with a gross weight of 10,001 lbs or more. Higher minimums apply to hazardous materials and some passenger carriers. The trucking company can also be liable under respondeat superior for the driver’s actions on the job.
A real work-zone case can involve two, three, or four of these defendants at once.
Arizona uses pure comparative negligence. That means your total damages get reduced by your assigned percentage of fault, but you can still recover even if you were mostly at fault. The formula:
Total damages × (100% − your fault percentage) = your recovery
So if a jury finds the damages are $200,000 and assigns 20% of the fault to the injured driver, the recovery is $160,000.
Here’s the part that matters in work-zone cases: under A.R.S. § 12-2506, a jury can also assign fault to non-parties. That means even if only the other driver is sued, the defense can ask the jury to put fault on the construction contractor or the ADOT subcontractor who isn’t in the courtroom. This is often called the empty-chair rule, and it can shrink a recovery if those parties aren’t proactively brought in or their share of blame isn’t refuted.
This is why work-zone cases need to be built carefully from day one. Arizona’s pure comparative negligence rule cuts both ways, and how the fault picture gets framed often decides the size of the recovery.
This is the single most important deadline in a work-zone case, and it’s the one most often missed.
When a claim involves ADOT, the City of Phoenix, or any other public entity, A.R.S. § 12-821.01 requires a notice of claim filed within 180 days of the date the cause of action accrues. That’s not the lawsuit deadline. That’s the threshold notice that has to be served on the government before suit is even allowed.
Miss it, and the public-entity claim is gone. No extensions for not knowing about it.
The 180-day notice has to:
A Broadway Curve crash may involve ADOT directly, an ADOT prime contractor, multiple subcontractors, and possibly the City of Phoenix depending on the project segment. Each public-entity defendant has its own notice requirement. We’ve seen otherwise strong cases die because the 180-day window passed before anyone identified all the right defendants.
If your crash happened in a Phoenix work zone and the project might be publicly contracted, treat the 180-day window as the operative deadline, not the two-year lawsuit deadline.
Under A.R.S. § 28-710, traffic fines double in posted work zones when workers are present. That’s a traffic rule, not a civil liability rule, but it matters in two ways for an injury case.
First, it reflects the legislature’s view that speeding in a work zone is a heightened wrong. That helps frame negligence per se arguments when the at-fault driver was cited for speeding through the zone.
Second, citations and the underlying officer reports become part of the proof package. When the other driver was cited for speeding in a work zone with workers present, that’s documented evidence of the violation, separate from any civil negligence finding a jury makes later.
The doubled fine itself doesn’t decide anything in a civil case. But it gives the negligence argument a stronger spine when speed was a factor.
Work-zone evidence has a shorter shelf life than evidence in a standard crash. Within days or weeks, the lane configuration may change, cones get moved, signs get repositioned, and the scene where the crash happened no longer exists in the same form.
What we move quickly to preserve:
If a commercial truck is involved, a preservation letter to the trucking company within days is critical. Federal hours-of-service rules limit property-carrying drivers to 11 hours of driving in a 14-hour shift with 10 hours off duty between shifts. ELD data is a primary record for verifying compliance, alongside supporting documents like fuel receipts, GPS records, bills of lading, and toll records.
The basics aren’t different from any crash, but a few items matter more here. If you can do it safely:
We have a fuller version of this checklist in what to do after a car accident for any Phoenix crash.
Two deadlines drive every work-zone case:
The 180-day deadline is the one that kills cases. Don’t let the two-year window lull you into thinking you have time. If a public entity is potentially involved, the clock that matters is much shorter.
Work-zone crashes often produce serious injuries because of the speed differential between moving traffic and stopped or slow traffic. Whiplash is a common diagnoses. Herniated discs, traumatic brain injury, and facial trauma from airbags also show up frequently.
Claim value depends on injury severity, treatment history, fault proof, available insurance, and how well economic and non-economic damages are documented. Economic damages cover medical bills (past and future), lost wages, and lost earning capacity. Non-economic damages cover pain, suffering, loss of enjoyment, and similar harm. We don’t publish typical dollar ranges, because every case turns on its own facts, but we do walk through how case value gets calculated in detail elsewhere.
Punitive damages can come into play in cases involving DUI, road rage, intentional misconduct, or gross negligence. A driver who was impaired and barreled through a posted work zone with workers present is a textbook punitive-damages fact pattern in Arizona.
For commercial truck claims, federal minimum financial responsibility rules apply on top of any Arizona requirements. Arizona’s minimum auto liability for policies issued or renewed beginning July 1, 2020 is 25/50/15 (25K bodily injury per person, 50K per accident, 15K property damage), which is why uninsured and underinsured motorist coverage matters so much when private drivers are at fault.
It depends on the facts, but liability often spreads across the at-fault driver, the construction contractor, an ADOT subcontractor, and sometimes the state agency itself. Arizona’s comparative negligence rule lets a jury assign percentages of fault among multiple parties, including non-parties, under A.R.S. § 12-2506.
No. A.R.S. § 28-710 doubles the traffic fine when workers are present, but a traffic citation doesn’t decide civil liability. It’s evidence supporting a negligence claim, and it helps frame negligence per se arguments, but the jury still decides fault percentages.
180 days from when the claim accrues to file a notice of claim under A.R.S. § 12-821.01. That’s separate from the two-year lawsuit deadline under A.R.S. § 12-542. Miss the 180-day notice and the public-entity claim is barred.
Generally, no. You’re not required to give a recorded statement to the other driver’s insurer. What you owe your own insurer depends on the cooperation terms in your policy. Get advice before you sit for one either way.
You can still recover under Arizona’s pure comparative negligence rule. Your damages get reduced by your assigned percentage of fault. So if the damages are $100,000 and you’re found 30% at fault, the recovery is $70,000.
Yes, when there’s evidence the contractor’s traffic control plan, signage, or work-zone setup didn’t meet MUTCD standards or industry practice. These claims require fast evidence preservation because the scene changes quickly.
Construction zone cases need to be sorted out fast. The 180-day notice clock is running if a public entity is involved, evidence is changing on the road every day, and commercial defendants will be moving to preserve their own version of events.
Talk to us before you talk to the other side. Free case review: (602) 345-1818. We’ll help you understand who’s potentially liable, what deadlines are running, and what your claim looks like before you commit to anything.
By Jared J. Pehrson | Impact Legal Car Accident Attorneys
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