12.3 Motor Carrier / Trucking and MCS-90

Motor Carrier and Truckers Coverage Forms

Long-haul and for-hire trucking exposures are written on the Motor Carrier Coverage Form (CA 00 20) or the older Truckers Coverage Form (CA 00 12). The Motor Carrier form is now the standard because it addresses modern leasing and interchange arrangements — most commonly a tractor owner-operator pulling a trailer under another carrier's federal operating authority.

These forms add trucking-specific concepts absent from the basic BAP: Trailer Interchange coverage, the allocation of liability between owner-operators and motor carriers, and definitions for autos used in the insured's business as a motor carrier for hire. A motor carrier is defined as a person or organization providing transportation by auto in the furtherance of a commercial enterprise — broader than the old 'trucker' definition, which is why the Motor Carrier form can cover private carriers (hauling their own goods) as well as for-hire carriers.

The forms also clarify coverage during non-trucking use (so-called 'bobtail' or 'deadhead' driving), when an owner-operator drives the tractor for personal use without dispatch. A separate Non-Trucking Use endorsement is often added so the owner-operator's tractor is covered while not under the motor carrier's dispatch, closing a gap the carrier's primary policy intentionally leaves open.

Trailer Interchange and Key Differences

Trailer Interchange coverage insures the insured's legal liability for physical damage to trailers in its possession that it does not own, taken under a written interchange agreement. It is written by symbol and carries its own limit and deductible.

Trap: Trailer interchange covers physical damage to NON-owned trailers in the insured's care under an interchange agreement — it is NOT liability coverage and NOT for owned trailers.

The MCS-90 Endorsement

The MCS-90 (Motor Carrier Act Endorsement) is required by the FMCSA for interstate for-hire carriers of property. It is NOT insurance coverage — it is a financial-responsibility surety guarantee to the public. If the carrier has no valid coverage, the insurer must still pay a third-party claimant up to the federal minimum, then has the right to reimbursement (recovery) from the insured.

Federal Minimum Limits (FMCSA)

Worked Example

A carrier hauling general freight lets its coverage lapse and causes a $600,000 injury accident. Under the MCS-90, the insurer must pay the injured public up to the $750,000 federal floor — so it pays the $600,000 — then recovers the full $600,000 from the insured because the MCS-90 is a public guarantee, not coverage for the insured. The endorsement protects the public, not the carrier; the carrier remains fully on the hook through the reimbursement right.

Do not confuse the MCS-90 with Motor Truck Cargo insurance, which is a separate inland-marine coverage protecting the freight (the goods) being hauled. The MCS-90 covers third-party BI and PD liability to the public; cargo coverage covers damage to the customer's shipment. Both are commonly carried by a trucker, but they answer entirely different exam questions.

Filings and the BMC-91

Federal authority also requires carriers to make a proof-of-insurance filing with the FMCSA. The Form BMC-91 (or BMC-91X) is the certificate of insurance the insurer files to evidence the required public-liability limits; the MCS-90 is the endorsement attached to the policy itself. State-level intrastate carriers may have a parallel Form E filing with the state regulator. The exam may ask which document is the FEDERAL public-liability proof — that is the BMC-91 filing, evidenced on the policy by the MCS-90 endorsement.

Remember the hierarchy: the policy provides the actual coverage; the MCS-90 guarantees the public is paid even if coverage fails; and the BMC-91 is the filing that tells the regulator the guarantee exists. Mixing these three up is a common trap.

Motor Carrier and Trucking Coverage Forms

The Motor Carrier Coverage Form (and the older Truckers Coverage Form) insure businesses that transport property for hire or their own goods, addressing exposures the standard BACF does not, such as trailer interchange and the unique relationships among owner-operators, lessees, and lessors. The motor carrier form is broader, accommodating both private and for-hire carriers, and it uses its own symbols. Trailer interchange coverage protects a carrier's liability for damage to trailers of others in its possession under interchange agreements.

The MCS-90 Endorsement and Federal Filings

The MCS-90 is a federally mandated endorsement required of interstate motor carriers under the Motor Carrier Act of 1980 / FMCSA rules. It is a surety-like public-protection guarantee: it obligates the insurer to pay a judgment for public bodily injury or property damage caused by the insured's negligent operation even if the policy would otherwise not cover it (for example, an unscheduled vehicle), up to the federally required minimum (commonly $750,000, higher for hazardous materials). The insurer can then seek reimbursement from the insured for amounts it would not normally have owed.

Why the MCS-90 Is Not Ordinary Coverage

The exam stresses that the MCS-90 protects the public, not the insured. It does not broaden the insured's own coverage; it guarantees payment to injured members of the public and creates a right of recovery against the insured for any payment the policy did not actually cover. Filings such as Form BMC-91/BMC-91X evidence financial responsibility to the FMCSA. Recognizing the reimbursement right and the public-protection purpose distinguishes the MCS-90 from a normal liability endorsement.