South Dakota Underride Accident Truck Accident Settlements

Average settlement ranges, South Dakota fault laws, and what to expect after a underride accident accident on I-90, I-29, US-83.

Last Updated:April 2026

Sources:FMCSA, NHTSA, South Dakota Court Records

Data:Verified against 49 CFR Part 390–399

Reviewed by:Licensed Attorney

⚠️ South Dakota has a 3-year statute of limitations on truck accident claims. Acting quickly protects your right to compensation.

Quick Facts: South Dakota Truck Accidents

FAULT RULE

Pure Comparative Fault

TIME TO FILE

3 Years

FED. MIN. INSURANCE

$750,000

TYPICAL MODERATE SETTLEMENT

$263K–$506K

How Much Is a Underride Accident Truck Accident Settlement in South Dakota?

In South Dakota, underride accident truck accident settlements typically range from $53K to $2.0M. The average settlement is approximately $263K–$506K, though severe cases involving surgery or permanent disability can exceed $2.0M. South Dakota's Pure Comparative Fault directly affects your final compensation amount.

South Dakota Underride Accident Settlement Ranges by Injury Severity

Severity Level	Typical Settlement Range
Minor (soft tissue only)	$15,000 – $75,000
Moderate (fractures, stitches)	$75,000 – $350,000
Severe (surgery required)	$350,000 – $1,200,000
Catastrophic (permanent disability)	$1,200,000 – $5,000,000+
Wrongful Death	$500,000 – $5,000,000+

What Factors Determine a Truck Accident Settlement in South Dakota?

→Injury severity and type of medical treatment required
→South Dakota's Pure Comparative Fault and your assigned fault percentage
→Economic damages: medical bills, lost wages, property damage
→Non-economic damages: pain and suffering, emotional distress
→Trucking company insurance policy limits (min. $750K federal)
→Evidence of FMCSA violations (49 CFR Part 390–399)

What Is a Underride Accident Truck Accident?

An underride accident occurs when a smaller vehicle slides beneath the rear or side of a trailer during a collision. Rear underride is the most common type — the passenger vehicle's roof shears off as it passes under the trailer bed. Even at relatively low speeds, underride accidents are frequently fatal due to the catastrophic intrusion into the passenger compartment.

Common Causes

→Inadequate or non-compliant rear underride guards (ICC bars)
→Trailer parked or stopped without lighting on a dark road
→Abrupt braking by the truck without warning
→Side underride: no side guards installed (not federally required)
→Guard damage from prior impacts not repaired

Common Injuries

→Decapitation or severe head/neck injuries (most common)
→Traumatic brain injury
→Facial crush injuries
→Spinal cord injury
→Wrongful death (extremely high rate in underride crashes)

Key Evidence & Liability Factors

▸Rear underride guard inspection records (FMCSA § 393.86)
▸Evidence of guard damage, improper installation, or non-compliance
▸Trailer lighting and reflector condition (§ 393.11)
▸National Highway Traffic Safety Administration (NHTSA) guard strength data
▸Prior safety inspections showing guard violations

FMCSA note: FMCSA 49 CFR § 393.86 mandates rear underride guards on trailers. However, side underride guards are not federally required — a significant gap in safety regulation that has been the subject of ongoing NHTSA rulemaking. Guards failing FMCSA standards greatly strengthen a plaintiff's case.

South Dakota Fault Laws and How They Affect Your Settlement

South Dakota follows pure comparative fault. This is governed by South Dakota Codified Laws § 20-9-2 (pure comparative fault).

South Dakota Fault Rule: Pure Comparative Fault

Under S.D. Codified Laws § 20-9-2, you can recover damages even if you were 99% at fault — your award is simply reduced by your percentage of fault.

Example: Your damages total $1,000,000. You are found 40% at fault. Your net recovery: $1,000,000 × (1 − 0.40) = $600,000.

Major South Dakota freight corridors: I-90, I-29, US-83, US-14, SD-44 — these interstates carry the highest commercial truck traffic volume in the state and account for a disproportionate share of large truck crashes.

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Frequently Asked Questions

In South Dakota, underride accident truck accident settlements typically range from $263K to $2.0M. South Dakota follows pure comparative fault, which means South Dakota follows pure comparative fault. The best way to estimate your specific case is to use our free calculator or consult a licensed South Dakota truck accident attorney.

The average underride accident truck accident settlement in South Dakota is approximately $263K–$506K for moderate injuries. Severe injuries with surgery or permanent disability can exceed $2.0M. Catastrophic and wrongful death cases routinely exceed $3 million in South Dakota.

In South Dakota, you have 3 years from the date of your accident to file. Missing this deadline typically bars you from recovery. Consult an attorney as soon as possible — the truck's black box data is often overwritten within 30 days.

South Dakota uses pure comparative fault. South Dakota follows pure comparative fault. For example, if you are found 20% at fault, your settlement is reduced by 20%.

Liability in commercial truck accidents often extends beyond the driver. Potentially liable parties include: the trucking company (respondeat superior, negligent hiring/training/retention); the cargo shipper or loader (if improper loading contributed); the truck or equipment manufacturer (product liability); a maintenance contractor; and in some cases, a broker who arranged the shipment. An experienced South Dakota truck accident attorney will investigate all potentially liable parties to maximize your recovery.

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