Mobile Equipment Versus Auto
Commercial auto policies cover autos, and the definition of auto generally excludes mobile equipment, which is defined separately. Mobile equipment typically includes bulldozers, farm machinery, forklifts, and other vehicles designed for use principally off public roads, as well as vehicles maintained for use solely on or next to premises you own or rent, and certain vehicles that provide mobility to permanently attached equipment. So a haul truck operating exclusively on mine property is usually mobile equipment rather than an auto. Liability arising from its operation generally falls under the general liability policy rather than the auto policy, and physical damage on it is handled under contractors equipment or similar inland marine coverage rather than auto physical damage. Two complications follow. First, the definitions are specific and the classification of any given unit depends on how it is used as well as what it is. A unit that is licensed for road use, or that actually travels on public roads, can move from one category to the other. Second, a vehicle that is mobile equipment while on site and is driven on a public road to reach another site may fall into the auto definition for that trip, and whether coverage follows depends on the policies in place. The practical approach is to list every unit, state how it is actually used, and confirm with the broker which policy covers each one for liability and for physical damage. That exercise routinely finds at least one unit that nobody can confidently place, and those are the ones that produce disputes.
- Commercial auto excludes mobile equipment, which is defined to include vehicles used principally off road
- Liability from on site mobile equipment generally falls under general liability
- Physical damage on mobile equipment is inland marine, not auto physical damage
- Classification depends on actual use, so list every unit and confirm where each one sits
Public Road Hauling
Product delivery is where the auto exposure becomes substantial, and it is frequently underestimated because the trucks are a small part of the operation. An aggregate producer running its own tri axles on public roads has a trucking exposure, with the same characteristics that make trucking a difficult line: urban and rural road accidents, severity driven by third party injury, and increasingly large verdicts. Limits set with reference to the mine's property values rather than to the severity of a highway accident are a common mismatch, and the umbrella and excess structure is where that shows up. Several specifics deserve attention. Driver qualification files, motor vehicle record review at hire and periodically, and a written fleet safety program are the controls carriers underwrite and the documents a plaintiff's attorney requests. Overweight and overload issues are a recurring exposure in aggregate hauling and can affect both liability and regulatory standing. Load securement and spillage from uncovered or improperly covered loads produces claims including windshield and vehicle damage to following traffic, which is frequent and usually small but affects frequency. And the regulatory status of the operation, including whether it is intrastate or interstate and what filings apply, shapes both compliance and financial responsibility requirements. Physical damage on road units is auto physical damage, and the valuation question matters for older tri axles whose actual cash value may be well below replacement cost in a tight used truck market.
- Own account hauling on public roads is a trucking exposure with severity driven by third party injury
- Size the umbrella tower to highway accident severity, not to property values
- Driver qualification files, record reviews, and a written fleet safety program are the underwritten controls
- Overweight loads and spillage are recurring aggregate hauling exposures
Contract Haulers and Customer Trucks
Most operations use contract haulers, and many load customer trucks, and both create exposure that is managed contractually rather than with the operation's own auto policy. For contract haulers, the operation's exposure is vicarious and direct. Vicarious, because a hauler delivering the operation's product may be argued to be acting for the operation, particularly where the operation arranges delivery and bills the customer for freight. Direct, because selecting a hauler with poor safety performance supports a negligent selection theory, which is the claim most often brought against those who arrange transportation. The controls are familiar: a written hauling agreement with required limits, the operation named as additional insured, indemnity, and evidence of coverage before the first load and at every renewal. Plus documented carrier vetting, which means checking operating authority, insurance, and publicly available safety performance data at onboarding and periodically, and keeping the record of having done it. Contingent auto liability coverage, which responds when the hauler's coverage fails, is the backstop and is relatively inexpensive. Customer trucks loading on site are the other direction. A customer truck that is overloaded at your scale, that is damaged by your loader, or that is involved in an accident on your property creates exposure. Written site rules, a check in process, documented scale practice to avoid overloading, traffic control and separation of customer trucks from operating equipment, and a loading practice that does not put your loader operator in a position to damage a customer vehicle all help. Where you load, you are handling someone else's property, which raises the same care, custody, and control question that affects coverage elsewhere.
- Contract haulers create vicarious exposure and negligent selection exposure
- Require written agreements, additional insured status, and evidence before the first load
- Document carrier vetting including authority, insurance, and safety performance data
- Customer trucks on site need site rules, traffic separation, and careful scale and loading practice
Site Roads, Access, and the Claims Between Categories
The last category is the claims that happen in the seams, and they are more common than the clean cases. Accidents on private haul roads involving two pieces of mobile equipment, or mobile equipment and a pickup, or a contract hauler's truck and a loader, all raise the question of which policy responds. The answer depends on the classification of each unit and the specific policy language, and where an operation has not done the classification exercise, that determination happens after the loss. Accidents at the point where the site road meets the public road are a recognized high frequency location, involving loaded trucks entering traffic with limited sight distance and often mud or material tracked onto the roadway. Material tracked onto a public road that causes an accident is a general liability exposure for the operation, and it is one that permitting authorities and neighbors both notice. Wheel wash facilities, road sweeping, and a documented practice are the controls. Dust and visibility on access roads, pedestrian and light vehicle separation from haul trucks, and the condition of haul roads themselves are all loss control items that show up in both frequency and underwriting. Finally, employee injury. Vehicle and mobile equipment incidents are among the leading causes of serious injury in mining and aggregate operations, which puts this subject at the center of the workers compensation picture as well as the liability picture. The training and traffic management practices that reduce one reduce the other, which is a rare case where the loss control investment pays into two lines at once.
- Private road accidents between units raise classification questions best answered before a loss
- The site road and public road intersection is a recognized high frequency location
- Material tracked onto public roads is a general liability exposure with permitting consequences
- Vehicle and mobile equipment incidents drive both liability and workers compensation severity
Frequently Asked Questions
Related Resources
This article is for general information and is not a substitute for policy language or professional advice.