South Dakota is one of only two states in the country that uses the "slight/gross" comparative negligence rule — and in a commercial truck case, where the carrier's defense team begins building its fault narrative within hours of the crash, this uniquely restrictive standard can eliminate an entire family's recovery based on a characterization of the victim's conduct as anything more than "slight."
The combination of South Dakota's unique fault rule, a 180-day government entity notice window, and the vast freight corridors of I-90 and US-83 creates a compressed legal environment where evidence preservation and immediate attorney involvement determine whether victims recover fully or lose everything under a comparative fault bar unlike any other state.
SDCL § 15-2-14 provides a three-year statute of limitations for personal injury claims in South Dakota. But the evidence timeline in commercial truck crash cases is measured in hours, not years. Electronic logging device data under 49 CFR § 395.22 must be preserved within 30 days before the carrier's retention schedule allows lawful destruction. Event data recorder (black box) downloads must be obtained before subsequent ignition cycles overwrite the pre-crash recording. Dashcam and forward-collision camera footage is overwritten within 24 to 72 hours. South Dakota's FMCSA adoption statute at SDCL § 49-28-33 requires carriers operating in the state to "conform as nearly as possible" with federal rules — violations of these standards are negligence per se. A litigation hold letter to the carrier, dispatched by an attorney within 48 hours of the crash, is the only mechanism that legally obligates the carrier to preserve all of these records.
SDCL § 20-9-2 codifies the "slight/gross" comparative negligence rule — one of the most plaintiff-restrictive fault standards in the nation. South Dakota and Nebraska are the only jurisdictions that still apply this standard. Under the slight/gross rule, a truck crash victim recovers only if their negligence was "slight in comparison" to the carrier's negligence. This is not a percentage test — "slight" is a qualitative standard construed strictly by South Dakota courts. A victim whom a jury finds to have been even marginally inattentive, following too closely, or traveling at a speed appropriate to road conditions but characterized as too fast by the defense may be found to have exceeded "slight" negligence — and the entire recovery is eliminated. Commercial carrier defense teams in South Dakota specifically target the slight/gross characterization because reaching it is far easier than reaching the 50% bar in other states.
When a South Dakota state highway, county road, or municipal street defect contributed to the commercial truck crash — a deteriorating bridge deck, a missing roadway sign, a flooded low-water crossing — SDCL § 3-21-2 requires a written notice of claim to the appropriate public entity within 180 days of the injury. This 180-day window runs immediately from the date of the crash, concurrent with the investigation and medical treatment that occupy most crash victims' first months. Missing the 180-day notice permanently bars the government-entity claim, even if the carrier remains fully liable. South Dakota's highway network — including federally funded I-90 and the state-maintained US-83, SD-44, and US-212 corridors — involves multiple maintaining entities, and the correct notice must go to each entity within 180 days.
South Dakota's FMCSA adoption under SDCL § 49-28-33, administered by the South Dakota Highway Patrol, requires carriers operating in interstate and intrastate commerce to comply with federal safety regulations including hours-of-service limits (49 CFR Part 395), vehicle inspection standards (49 CFR Part 396), and cargo securement rules (49 CFR Part 393). Violations of these federal standards in a South Dakota crash are negligence per se — establishing that the carrier violated a safety regulation designed to prevent exactly the type of crash that occurred creates a presumption of fault without additional proof. Obtaining the carrier's FMCSA Safety Measurement System (SMS) history, pre-trip inspection records, driver qualification file, and ELD data immediately after the crash builds the case that the carrier's fault was gross — and the victim's fault, if any, was at most slight.
Legal Information Notice
The legal information on this page is for general educational purposes only and is not legal advice. Laws change, and every case is different. Always consult with a licensed attorney in your state to verify the current law and how it applies to your specific situation.
SDCL § 20-9-2 applies the "slight/gross" comparative negligence standard — one of only two jurisdictions in the United States that uses this rule. The victim recovers only if their negligence was "slight in comparison" to the carrier's. Unlike the 50% or 51% bars in most states, "slight" is a qualitative standard construed strictly — even modest victim fault attributions can bar the entire recovery. Commercial carrier defense teams specifically target this characterization because reaching it is far easier than reaching a 50% threshold. Building an overwhelming record of the carrier's FMCSA violations, ELD non-compliance, and driver fatigue is the most reliable way to establish that any victim fault was, at most, slight in comparison. Source: South Dakota Legislature, https://sdlegislature.gov/api/Statutes/Statute/20-9-2
SDCL § 15-2-14 provides a three-year statute of limitations. But federal evidence retention rules allow carriers to purge ELD records after six months under 49 CFR § 395.22, and dashcam footage is overwritten within 24-72 hours. If a government entity shares fault — through a road defect, construction zone, or government vehicle — SDCL § 3-21-2 requires a written notice of claim within 180 days of the injury. Missing the 180-day government notice deadline permanently bars the public-entity claim. An attorney should serve litigation hold demands within 48 hours of the crash. Source: South Dakota Legislature, https://sdlegislature.gov/api/Statutes/Statute/15-2-14
Yes. SDCL § 49-28-33 requires South Dakota carriers to conform to federal FMCSA regulations — including hours-of-service limits (49 CFR Part 395), electronic logging device requirements (§ 395.22), vehicle inspection standards (49 CFR Part 396), and cargo securement rules (49 CFR Part 393). Violations of these standards are negligence per se in South Dakota. The South Dakota Highway Patrol enforces FMCSA compliance under Chapter 49-28. A carrier's FMCSA Safety Measurement System record — publicly accessible at ai.fmcsa.dot.gov — often reveals a pattern of prior violations that strengthens the gross negligence characterization necessary to overcome South Dakota's slight/gross comparative fault rule. Source: FMCSA, https://www.fmcsa.dot.gov/regulations/federal-motor-carrier-safety-regulations
SDCL § 3-21-2 requires that before suing a public entity — the state of South Dakota, a county, a city, or another government body — for a truck crash involving a road defect, construction zone failure, or government vehicle, the injured party must file a written notice of claim specifying the time, place, and cause of injury within 180 days of the incident. Missing this deadline permanently bars the government-entity claim regardless of the three-year civil SOL. South Dakota's highway network involves multiple maintaining entities — the Department of Transportation, county highway departments, and cities — and the correct notice must go to each within 180 days. Source: South Dakota Legislature, https://sdlegislature.gov/Statutes/3-21-2
South Dakota does not cap compensatory damages in commercial vehicle accident cases. Available recovery includes all past and future medical expenses, lost wages and earning capacity, rehabilitation costs, pain and suffering, and property damage. The critical obstacle is the slight/gross comparative negligence rule (SDCL § 20-9-2) — if the defense can characterize the victim's conduct as more than slight, the entire recovery is eliminated. Punitive damages are available in South Dakota for oppressive, fraudulent, or malicious conduct — a characterization that can be supported by evidence of systematic FMCSA violations, falsified logs, or knowing dispatch of a fatigued driver. Minimum auto liability requirements of 25/50/25 under SDCL § 32-35-70 rarely cover serious truck crash damages, making investigation of umbrella and excess coverage essential. Source: South Dakota Legislature, https://sdlegislature.gov/Statutes/32-35-70
All legal information on this page is sourced from primary government statutes. Last verified 2026-04-07.
In-depth articles relevant to your truck accident lawyer case.
Truck Accident vs Car Accident Claims: Key Differences
Understand why truck accident claims are more complex and valuable than car accidents. Multiple liable parties, federal regulations, and more.
How Long Does a Personal Injury Case Take? (2026 Timeline)
Understand the typical timeline of a personal injury case from filing to settlement. Learn what factors speed up or delay your claim.
How to Deal With Insurance Companies After an Accident (2026 Guide)
Learn how to deal with insurance adjusters after an accident. Avoid common traps, protect your claim, and maximize your settlement.
Different type of accident? We connect victims with attorneys across all six practice areas.
Collected by partner attorneys for injured clients. California and Pennsylvania reviews prioritized.
“After my crash, I did not know whether to talk to the insurance company first or get treatment documented. The attorney explained the timeline and what evidence mattered.”
— California accident review, Los Angeles, CA
“I did not understand Pennsylvania limited tort or why the adjuster kept asking about my policy. Getting matched with someone local helped me know what questions to ask.”
— Pennsylvania accident review, Philadelphia, PA
Informational only. GetAccidentLawyerNow is not a law firm and does not provide legal advice. Every case is unique.
Don't wait. The 3 years statute of limitations is ticking.
Call (267) 212-1034 Now*Past results do not guarantee future outcomes. Every case is unique.