12.3 Motor Carrier / Trucking and MCS-90

Motor Carrier vs. Truckers Coverage Form

Businesses that transport goods or people for hire face exposures the standard BAP does not fully address — leased equipment, trip leasing, and trailers swapped between carriers. ISO's Truckers Coverage Form historically handled this; it has largely been superseded by the Motor Carrier Coverage Form (CA 00 20), which is broader and reflects modern federal regulation. A motor carrier is a person or organization providing transportation by auto in the furtherance of a commercial enterprise.

The Motor Carrier form addresses key trucking-specific questions: who is an insured when a tractor is leased to another carrier (the trip-lease problem), and how to cover a trailer the insured does not own but is hauling under an interchange agreement.

Federal Financial-Responsibility Minimums

The Federal Motor Carrier Safety Administration (FMCSA) sets minimum liability limits for interstate for-hire carriers. These dollar figures are commonly tested:

A carrier hauling general freight in interstate commerce must therefore carry at least $750,000 of liability, even though many shippers and brokers contractually require $1,000,000.

The MCS-90 Endorsement

The MCS-90 (Endorsement for Motor Carrier Policies of Insurance for Public Liability) is required by federal law as proof of financial responsibility. It is one of the most misunderstood items on the exam, so anchor on three facts:

1. It protects the public, not the insured. The MCS-90 forces the insurer to pay any final judgment recovered against the carrier for bodily injury or property damage to members of the public, up to the federal minimum, even if the underlying policy would not have covered the loss (for example, an excluded vehicle, a lapsed schedule, or a hazardous-cargo gap).

2. It is surety-like, not coverage. Because it is essentially a financial guarantee, when the insurer pays a claim it would NOT have owed under the policy's actual terms, the MCS-90 gives the insurer the right to seek reimbursement from the motor carrier for that payment plus expenses.

3. It fills only federal-minimum gaps. The MCS-90 responds up to the FMCSA minimum (e.g., $750,000), not the full policy limit, and only for public liability — not for cargo, the insured's own property, or workers compensation.

Trailer Interchange Coverage

The Motor Carrier form's Trailer Interchange coverage insures the named carrier for loss to a trailer it does not own but holds under a written interchange agreement. The insured selects comprehensive, specified causes of loss, and/or collision — mirroring physical-damage structure — with its own limit and deductible per trailer. Owned trailers are insured under the regular covered-auto physical damage; interchange is strictly for the non-owned trailer in the insured's care.

The Motor Carrier Coverage Form

Long-haul trucking and for-hire carriers are written on the Motor Carrier Coverage Form rather than the Business Auto Form. It addresses exposures unique to trucking: trailer interchange (liability for trailers of others in the insured's possession under a written interchange agreement) and the use of owner-operators. It uses similar covered-auto symbols but adds symbols for trailers in the insured's care.

The MCS-90 Endorsement and Federal Filings

The MCS-90 endorsement is a federally mandated financial-responsibility endorsement for motor carriers operating in interstate commerce. It is not ordinary insurance — it is a public-protection guarantee. If the carrier's policy would not otherwise pay (because of an exclusion or an uncovered vehicle), the insurer must still pay an injured member of the public up to the federal minimum, then seek reimbursement from the insured.

Federal minimum limits depend on cargo: commonly $750,000 for general freight, $1,000,000 for certain oil/hazardous substances, and $5,000,000 for the most hazardous materials. The exam's key point: the MCS-90 protects the public, pays even when the policy would not, and grants the insurer a right of reimbursement against the insured — distinguishing it from true first-party or liability coverage.

Trailer Interchange and Owner-Operators

The Motor Carrier form's trailer interchange coverage handles a trucking reality: carriers swap trailers under written interchange agreements, so a carrier is often hauling a trailer it does not own. The form covers the insured's liability for physical damage to those non-owned trailers in its possession. Owner-operators — independent drivers who lease their rigs to a carrier — create layered exposures addressed by the carrier's policy and by the owner-operator's own bobtail/non-trucking liability coverage.

The exam point: trailer interchange responds to damage to others' trailers the carrier controls, distinct from ordinary physical damage on owned units.

Bobtail and Non-Trucking Liability

When an owner-operator drives the tractor without a trailer and not under dispatch (for example, driving home after dropping a load), the motor carrier's policy may not respond. Bobtail (non-trucking) liability fills this gap, covering the tractor while used for non-business purposes. This is a frequent contrast: the carrier's primary policy covers the rig in the business of the carrier, while bobtail covers the off-duty use the carrier's coverage excludes.