Primary Auto Liability
Primary auto liability is the foundation of any trucking program and the coverage FMCSA cares about most. It covers bodily injury and property damage your truck causes to others. Federal minimums were set in the 1980s and many shippers, freight brokers, and large shippers now require $1M or more regardless of what FMCSA mandates.
The MCS-90 endorsement attaches to this policy for interstate carriers: it’s a federal compliance filing, not extra coverage, and the distinction matters when a carrier seeks reimbursement after paying a claim under it.
Motor Truck Cargo
Motor truck cargo covers the freight itself, not the truck. It’s the policy that pays when a load is stolen, damaged in transit, or destroyed. Commodity class drives both your eligibility and your rate.
Read the exclusions on any cargo form carefully: acts of God, improper loading, temperature failure without a reefer endorsement, and inherent vice are common carve-outs. For a full breakdown of how motor truck cargo coverage is structured and priced, that page covers the detail.
Bobtail vs Non-Trucking Liability
The bobtail vs NTL distinction is one of the most misunderstood splits in trucking insurance, and getting it wrong leaves a real gap. Bobtail insurance covers a tractor operating without an attached trailer, typically between loads or after a drop. Non-trucking liability covers a tractor used for personal purposes while it’s not under dispatch.
These are different situations, different policy forms, and not interchangeable. If you’re an owner-operator leased to a motor carrier, you likely need both. For a clear breakdown of non-trucking liability vs bobtail coverage, that page works through the distinction with examples.
