I-90 Semi-Truck Accident Lawyer

Interstate 90 cuts across the full width of South Dakota, stretching from the Wyoming border near Spearfish through Rapid City, Murdo, Mitchell, and into Sioux Falls before crossing into Minnesota. It is one of the longest and most heavily trafficked freight corridors in the country. Every day, hundreds of commercial semi-trucks use I-90 to move goods across the region. When those trucks collide with passenger vehicles, the results are rarely minor. The physics of a fully loaded 80,000-pound commercial rig do not leave much room for survivors to walk away unscathed. If you or someone in your family was struck by a semi-truck on I-90, the decisions made in the days and weeks following the crash will shape what compensation you are actually able to recover.

What makes I-90 truck accident cases different from an ordinary car crash claim is the volume of overlapping legal questions that come into play. Who was the truck driver actually working for? Did a logistics broker or shipper control the load? Was the trailer leased from a separate company? Were there hours-of-service violations buried in the driver’s electronic log? Was the truck last inspected before it left a distribution hub in Rapid City or Mitchell, and did it pass? These questions matter because the answers determine who is liable, how much insurance coverage is available, and what evidence needs to be preserved before it disappears.

Hoy Law represents people injured in commercial truck accidents along I-90 and across South Dakota. The firm has over 150 years of combined legal experience and includes the only board-certified trucking accident lawyers in South Dakota, a distinction that speaks directly to the depth of specialized knowledge this type of litigation demands.

What Happens on I-90 That Makes Truck Crashes So Destructive

I-90 in South Dakota presents a combination of conditions that consistently contribute to serious commercial truck accidents. Long, open stretches through the Badlands and central plains encourage trucks to run at high speed for hours at a time. Fatigue accumulates. Weather can change quickly, with ice and blowing snow creating whiteout conditions across the open prairie that drivers from out of state may not anticipate. The stretch of I-90 near the Rapid City exits sees heavy truck traffic tied to Black Hills tourism logistics and regional distribution. Near Sioux Falls, congestion around the interchange with I-29 creates bottleneck conditions where rear-end collisions and lane-change accidents involving semis are common.

The road itself also creates exposure. Long grades descending into river valleys test braking systems. Trucks that are poorly maintained, overloaded, or carrying improperly secured cargo are significantly more dangerous on these types of roadways. A blowout at highway speed can cause a driver to lose control entirely. A load that shifts on a curve can flip a trailer onto the cars traveling alongside it.

Understanding the physical environment where your accident happened matters in building a liability case. It helps establish what a reasonably careful truck driver or carrier should have anticipated, and it provides context for evidence gathered from the scene, from traffic cameras near major exits, and from the truck’s own onboard systems.

Liable Parties in an I-90 Truck Accident Case

• The Truck Driver: Driver negligence includes speeding, distracted driving, falling asleep at the wheel, driving under the influence, or violating federal hours-of-service rules that cap how many consecutive hours a commercial driver can operate a vehicle before mandatory rest.
• The Trucking Company or Motor Carrier: Carriers can be liable for negligent hiring, inadequate driver training, pressure on drivers to skip rest breaks to meet delivery deadlines, and failure to maintain vehicles in roadworthy condition. Federal regulations impose direct obligations on carriers, not just their drivers.
• The Cargo Owner or Shipper: If freight was improperly loaded, overloaded beyond legal weight limits, or inadequately secured before the truck left a facility, the shipper or freight broker may share liability for an accident caused by shifting or falling cargo.
• Vehicle or Parts Manufacturers: A defective braking system, faulty tire, or malfunctioning trailer coupling component can cause or contribute to a crash. Product liability claims may run parallel to negligence claims in these situations.
• Maintenance and Inspection Contractors: Third-party shops that service commercial fleets can be held accountable if a mechanical failure traceable to negligent repair or inspection contributed to the collision.
• Other Motorists: In some I-90 accidents, the initial triggering event involves a passenger vehicle cutting off a semi-truck or causing a chain-reaction collision. South Dakota’s contributory negligence rule allows recovery only when the injured person’s own negligence was slight compared to the negligence of the party who caused the harm, and the award is then reduced in proportion to the injured person’s contributory negligence.

Protecting Your Claim After a Truck Crash on I-90

The period immediately after an I-90 truck accident is critical, and it moves faster than most injured people realize. Trucking companies typically have accident response teams that can be on-site or on the phone within hours of a serious crash. Their goal is to begin documenting the scene in a way that protects the carrier’s interests. Evidence from the truck itself, including electronic logging device data, the onboard event data recorder, dash camera footage, and GPS records, can be overwritten or destroyed if a legal hold is not promptly demanded.

If you are able, seek emergency medical care immediately. South Dakota has major trauma centers at Avera McKennan Hospital and Sanford USD Medical Center in Sioux Falls, and Regional Health at Rapid City Regional Hospital serves the western part of the state. Accepting treatment is not only the right decision for your health, it also creates the medical records that document the connection between the crash and your injuries. Gaps in treatment are one of the first things insurance adjusters use to argue that injuries were not serious or were caused by something else.

Report the accident to law enforcement and make sure a crash report is filed. On I-90, the South Dakota Highway Patrol typically responds to commercial vehicle accidents. That crash report will be a foundational document in your claim. Obtain a copy as soon as it becomes available.

For an adult, South Dakota’s personal injury statute of limitations generally gives injured people three years from the date of an accident to file a lawsuit. That window sounds generous, but the practical deadline for preserving evidence is far shorter. Contacting an I-90 semi-truck accident attorney early gives your legal team the best opportunity to issue spoliation letters to the carrier, subpoena driving records and maintenance logs, and retain the right accident reconstruction experts before the physical evidence at the crash site is altered by weather or construction.

Do not provide a recorded statement to the trucking company’s insurer before speaking with an attorney. Adjusters are trained to ask questions in ways that can minimize or complicate your claim later. Letting your legal team handle those communications from the start eliminates a common source of early damage to otherwise strong cases.

Federal Regulations and Why They Matter to Your Case

Commercial truck accidents are governed not just by South Dakota negligence law but by a substantial body of federal regulations administered by the Federal Motor Carrier Safety Administration. These rules cover everything from the maximum number of hours a driver may operate per shift, to drug and alcohol testing requirements, to weight and cargo securement standards, to mandatory vehicle inspection intervals.

When a trucking company or driver violates one of these regulations, that violation can serve as powerful evidence of negligence. Proving a regulatory violation does not automatically win a case, but it significantly shifts the weight of the argument. It tells a jury that there were clear, written standards in place, the defendant knew about them, and chose not to follow them.

Reviewing a truck driver’s hours-of-service logs, for example, may reveal that the driver had been on the road far longer than federal rules permit before the crash. Pulling the carrier’s inspection records may show a pattern of deferred maintenance on the braking system of the exact truck involved. These are the kinds of discoveries that experienced I-90 semi-truck accident attorneys look for, and they require knowing where to look and how to obtain the records before they are altered or lost.

South Dakota uses a contributory negligence standard. An injured person whose negligence was more than slight compared to the defendant’s cannot recover, while one whose negligence was only slight can recover damages reduced in proportion to their contributory negligence. If an insurer attempts to assign partial blame to you, a legal team that knows how to document and present the trucking company’s conduct can push back on that narrative effectively.

Questions People Ask After an I-90 Truck Accident

How is a truck accident claim different from a regular car accident claim?

Truck accident claims involve more potential defendants, more insurance policies, and a layer of federal regulatory compliance that ordinary auto accident claims do not. The injuries tend to be more severe, which raises the stakes on both sides. Carriers often carry much higher liability insurance limits than individual drivers, which changes the negotiation dynamic and the litigation strategy.

What should I do if the trucking company’s insurance adjuster contacts me right away?

You are not required to speak with them, and doing so before you have legal representation carries real risk. Adjusters may seem cooperative, but their job is to close claims for as little as possible. Politely decline to give a recorded statement and let an attorney handle those communications.

Who pays for my medical bills while my claim is pending?

This depends on several factors. Your own health insurance may cover initial treatment, subject to any applicable reimbursement obligations once your claim resolves. Some injured people use their vehicle’s MedPay or personal injury protection coverage if available. Your attorney can help identify which sources of coverage apply in your specific situation and in what order.

Can I still recover compensation if I was partially at fault for the crash?

Under South Dakota’s contributory negligence law, an injured person’s own negligence does not bar a claim if it was slight compared to the defendant’s negligence, although any award is reduced in proportion to it. This is why it matters to have attorneys who will actively contest any attempt to overstate your contribution to the accident.

How long does an I-90 truck accident case typically take to resolve?

There is no single answer. Cases that involve clear liability, documented damages, and cooperative insurers may resolve within months. Cases involving disputes over fault, catastrophic injuries with ongoing medical treatment, or multiple defendants and insurance carriers can take considerably longer. Filing a lawsuit does not mean a trial is inevitable, but having trial-ready attorneys increases settlement leverage throughout the process.

What if the truck driver was an independent contractor rather than a company employee?

Trucking companies sometimes classify drivers as independent contractors to limit their liability exposure, but courts and federal regulations often look past that classification. If the carrier exercised control over the driver’s routes, schedule, or work conditions, the carrier may still be held liable under theories like statutory employment or agency. This is a fact-specific analysis that requires close review of the contracts and the actual working relationship.

Is there a limit on how much I can recover in a South Dakota truck accident case?

South Dakota does not cap compensatory damages in personal injury cases the way some states do. You may be entitled to recover past and future medical expenses, lost wages, reduced earning capacity, and non-economic damages for pain, suffering, and loss of enjoyment of life. The actual recovery depends on the strength of the evidence, the severity of your injuries, and the available insurance coverage.

What if the truck crossed into my lane and I swerved to avoid it but still crashed?

You do not have to make physical contact with the truck to have a valid claim. If a truck driver’s negligent maneuver forced you to take evasive action that resulted in your accident, the driver and carrier may still bear liability. Establishing causation in these so-called “phantom” or “forced off the road” scenarios requires strong evidence, including witness accounts, traffic camera footage, and accident reconstruction analysis.

Does it matter that the accident happened on a federal interstate versus a state highway?

The road designation itself does not change the applicable negligence law in South Dakota, but it may affect which law enforcement agency investigated, what traffic control infrastructure was present, and what federal highway design standards apply if road conditions contributed to the crash. I-90’s status as a federally designated corridor also means it carries a particularly high volume of federally regulated commercial carriers, making regulatory compliance issues more likely to be relevant.

What evidence should I try to preserve on my own after the accident?

Photographs of your vehicle, the truck, the road surface, skid marks, debris, and signage are valuable. If you are physically able, document the scene before vehicles are moved. Keep records of every medical appointment, prescription, and treatment. Save all communications with insurance companies. Write down your own account of the crash as soon as possible while the details are clear. Your attorney will pursue the formal legal channels to obtain truck-side data, but anything you can document personally in the immediate aftermath adds depth to the record.

Serving Truck Accident Victims Along I-90 and Across South Dakota

Hoy Law represents clients injured in commercial truck accidents throughout South Dakota, including communities along the full length of Interstate 90. From the western gateway communities of Spearfish, Sturgis, and Box Elder near Rapid City, through the central corridor towns of Wall, Kadoka, Murdo, Chamberlain, and Lyman County, and continuing east through Mitchell, Plankinton, Kimball, and Murdo to the Sioux Falls metro area, the firm handles I-90 truck accident cases from one end of the state to the other. Clients also come from Brookings, Watertown, Aberdeen, Huron, Pierre, and the surrounding communities throughout eastern and central South Dakota. The firm’s reach extends to the Nebraska and Minnesota border regions for accidents involving South Dakota roadways and multi-state carriers. Wherever along I-90 your accident occurred, distance is not a barrier to representation.

Talk to an I-90 Semi-Truck Accident Attorney About Your Case

Hoy Law offers free consultations to people injured in commercial truck crashes on I-90 and throughout South Dakota. There are no upfront costs and no fees unless your case recovers. The firm’s I-90 semi-truck accident attorneys have the credentials, the regulatory knowledge, and the litigation experience to take on large trucking companies and their insurers. Call or reach out to Hoy Law today to have your situation evaluated by attorneys who have spent their careers handling exactly these kinds of cases.