A severe truck crash can involve more than one source of payment, but the coverage does not always operate as a simple stack in which every policy automatically pays. The policy language, insured parties, vehicle, work arrangement, loss date, and any self-insured amount determine which coverage responds and in what order.
For an injured person, the practical task is to identify each potentially responsible company and obtain the policies and endorsements that were in force. A declarations page alone may show a limit without revealing exclusions, named insureds, notice requirements, or the attachment point for an excess policy.
Sunrise over an open highway with a transparent legal roadmap graphic for commercial carrier claims.
Start with the documents, not the labels
People often use “primary,” “excess,” and “umbrella” as if those words settle the order of payment. They do not. The complete policy and its endorsements control. A useful coverage review usually asks for:
- the commercial auto policy and declarations;
- all endorsements, including any MCS-90 endorsement;
- excess and umbrella policies;
- self-insured retention or deductible documents;
- leases, broker-carrier agreements, and indemnity provisions;
- documents identifying the tractor, trailer, driver, motor carrier, and DOT number; and
- notices sent to every potentially involved insurer.
A policy may insure the motor carrier but not a separate broker, lessor, shipper, or maintenance company. Another policy may cover a scheduled vehicle, hired auto, or permissive user under defined conditions. The insured-party analysis belongs alongside the fault investigation.
What the common coverage parts mean
Scroll horizontally to see all columns. Use the arrow keys when the table is focused.
| Coverage part | What to verify | Why it matters |
|---|---|---|
| Self-insured retention | Who administers the retained amount, who has defense duties, and what event activates the insurer’s obligations | A retention is not itself a second insurance policy. The contract determines how it interacts with the policy above it. |
| Primary commercial auto | Named insureds, covered autos, exclusions, limits, and endorsements | This is often the first insurance policy examined, but “primary” does not answer every priority dispute. |
| Excess policy | Underlying schedule, attachment point, exhaustion language, notice terms, and whether it follows the underlying wording | An excess carrier may contest whether the required underlying amount has been paid or otherwise exhausted. |
| Umbrella policy | Underlying coverage, retained limits, exclusions, and any broader grant of coverage | An umbrella may provide excess limits and sometimes broader coverage, but its own terms still govern. |
Catastrophic injuries do not by themselves activate every upper layer. The claimant must establish liability and covered damages, while the policy conditions governing the next layer must also be satisfied. That is why a release directed to one insured or insurer should not be signed without understanding its effect on the remaining parties and policies.
Federal financial responsibility is a floor, not a coverage inventory
49 C.F.R. § 387.7 requires covered motor carriers to maintain the applicable minimum level of financial responsibility. For a for-hire carrier transporting nonhazardous property in interstate or foreign commerce in a vehicle with a gross vehicle weight rating of 10,001 pounds or more, § 387.9 lists a $750,000 minimum. Higher amounts apply to specified hazardous materials and oil.
Those regulatory figures do not prove that $750,000 is the only available limit. A carrier may purchase higher primary limits, combine policies, qualify for authorized self-insurance, or maintain excess coverage. FMCSA may approve a carrier as a self-insurer under 49 C.F.R. § 387.309 after reviewing the required financial and safety information.
The MCS-90 is an endorsement used to meet federal public-liability requirements. It should not be described as a free-standing umbrella policy or an automatic additional layer for every defendant. FMCSA explains that the endorsement attaches to the motor carrier’s liability policy and applies to vehicles operated under that policy that are subject to the federal requirements.
Louisiana issues that can change the analysis
A fully intrastate operation may require a different regulatory analysis. Louisiana R.S. 32:900 includes financial-responsibility provisions for motor vehicles, including specific limits in subsection M for certain motor carriers. The truck’s weight, cargo, route, and type of operation matter. It is unsafe to choose a limit based only on the fact that the collision occurred in Louisiana.
Louisiana’s direct-action statute also changed in 2024. Under the current text of R.S. 22:1269, an injured person generally does not have an unrestricted right to sue the liability insurer directly. The statute lists circumstances in which direct action is permitted and contains rules for joining an insurer when judgment is entered or a settlement is reached during litigation. That procedural question is separate from whether the policy covers the loss.
The collision date also affects comparative fault. For a cause of action arising on or after January 1, 2026, Civil Code article 2323 generally bars recovery when the claimant is 51 percent or more at fault and reduces damages proportionally when fault is 50 percent or less. Earlier causes of action remain subject to the prior comparative-fault rule. Coverage limits do not remove the need to prove fault and damages.
Why several companies do not always mean several policies
The tractor owner, trailer owner, motor carrier, driver employer, freight broker, shipper, and maintenance contractor may be different entities. That can produce several policies, but it can also produce overlapping insured status under one policy or no liability for a particular company.
The bill of lading, lease, dispatch records, carrier-safety records, and broker-carrier agreement help explain the business relationships. They do not replace the policies. For example, an indemnity clause may allocate responsibility between companies without creating coverage that an insurance contract does not provide.
Related evidence can disappear or change in ordinary business systems. A preservation request should identify the vehicles, electronic logging data, dispatch communications, inspection and maintenance records, onboard recordings, and relevant insurance and contracting documents. Our guide to electronic logging device evidence explains what an ELD can and cannot show.
Questions that reveal the real coverage picture
- Which legal entity operated under the DOT number displayed on the truck?
- Who owned and leased the tractor and trailer on the collision date?
- Was the movement interstate commerce, and what cargo was being transported?
- Which policies identify each defendant as a named or additional insured?
- What vehicles and operations are covered or excluded?
- Is there a deductible or self-insured retention, and who controls the defense within it?
- What is the attachment point for each excess policy?
- What notice has been given to the primary, excess, and umbrella carriers?
- Would a proposed release affect claims against another insured or coverage layer?
These questions should be answered before treating the first stated limit as the entire recovery picture. They are especially important when medical needs, lost earning capacity, or wrongful-death damages could exceed a primary limit.
What an injured person can do now
Photograph the truck, trailer, company markings, license plate, and DOT number if it is safe to do so. Keep the crash report information, medical records, bills, wage records, photographs, and every letter or email from an insurer. Do not guess about coverage in a recorded statement, and review any release before signing it.
The firm’s Louisiana truck accident practice can investigate the companies and policies connected to a collision. The related guide to truck accident insurance coverage discusses additional sources of coverage and common evidence used in that review.
Sources checked: September 29, 2026. Last reviewed: September 28, 2026.