Will IIHS start rating Class 8 ADAS? OEMs say yes at ACT Expo

Will IIHS start rating Class 8 ADAS systems?

Original equipment manufacturers at the 2026 Advanced Clean Transportation Expo said they would welcome Insurance Institute for Highway Safety ratings for heavy-duty trucks, according to attendees at the event. The IIHS currently rates passenger-vehicle ADAS systems but does not publish standardized test results for Class 7 and Class 8 collision-avoidance hardware.

The prospect of third-party ratings surfaced during ACT Expo panel discussions, where OEM representatives indicated support for independent testing of forward-collision warning, automatic emergency braking, and lane-departure systems on heavy-duty platforms. No timeline or formal IIHS announcement accompanied the comments.

Why OEMs want third-party ADAS ratings

Standardized ratings would give fleets a common benchmark when comparing ADAS packages across manufacturers. Today, OEMs publish braking-distance claims and sensor-range specs, but test conditions vary — dry pavement versus wet, laden versus empty, 30 mph versus 60 mph approach speed. A fleet evaluating Freightliner Detroit Assurance versus Volvo Active Driver Assist versus Paccar Collision Mitigation has no apples-to-apples data on false-positive rates, night-performance degradation, or how often the system brakes hard enough to spill an unsecured load.

IIHS ratings for passenger cars score systems on a five-tier scale — Superior, Advanced, Basic, Marginal, and Poor — based on track tests that measure stopping distance, pedestrian detection, and driver-alert effectiveness. A similar framework for Class 8 would let a shop supervisor or fleet safety manager compare systems without relying solely on OEM marketing.

Third-party validation also addresses liability concerns. When an AEB-equipped truck rear-ends a stopped vehicle, the carrier's insurer and plaintiff's counsel both ask whether the system performed to spec. An IIHS rating tied to repeatable test protocols gives both sides a reference point.

What IIHS ratings would test in heavy-duty trucks

Passenger-vehicle IIHS tests measure forward-collision warning timing, AEB engagement speed, and pedestrian detection at crosswalks. Heavy-duty equivalents would need to account for longer stopping distances, air-brake lag, and the physics of a loaded trailer. A Class 8 tractor at 80,000 pounds GVW needs roughly 525 feet to stop from 65 mph on dry pavement — more than double the distance of a passenger car.

Key variables an IIHS heavy-duty protocol would likely test:

• Sensor range and field of view — radar and camera coverage at highway speed, ability to detect stationary objects beyond 500 feet.
• Brake application force — whether the system applies full service brakes or modulates pressure to avoid jackknifing.
• False-positive rate — how often the system brakes for overpasses, roadside signs, or vehicles in adjacent lanes.
• Performance degradation — sensor accuracy in rain, snow, and low-angle sun.
• Driver override — how quickly a driver can disengage AEB if the system misreads the situation.

OEMs already conduct internal validation, but results remain proprietary. Freightliner's radar-based Cross Traffic Assist and Active Side Guard Assist 2, announced for the 2027 Cascadia, include intersection and left-turn braking — features not yet covered by any public third-party test.

How ADAS ratings would change spec decisions

Fleets today spec ADAS based on insurance discounts, CSA score impact, and OEM bundling. A carrier ordering 50 Freightliner Cascadias might take Detroit Assurance 5.0 because it's standard on the powertrain package, not because independent data shows it outperforms Bendix Wingman Fusion on the Kenworth T680 alternative.

IIHS ratings would add a third data point: objective system performance. A fleet safety director could pull the IIHS scorecard, compare Superior-rated systems, and negotiate price based on which OEM charges a premium for hardware that doesn't deliver measurably better results.

The ratings would also pressure OEMs to improve lower-tier systems. If a manufacturer's base ADAS package scores Marginal while competitors hit Advanced, that gap shows up in every RFP. The same dynamic drove rapid improvement in passenger-vehicle AEB after IIHS began rating systems in 2013.

What this means for small fleets and owner-operators

Small fleets and owner-operators buying used trucks would gain transparency into ADAS performance on older model years. A 2025 Peterbilt 579 with a Basic-rated system trades differently than one with a Superior-rated package, even if both have the same mileage and engine hours. The rating becomes part of the truck's residual value.

Shops would also benefit. Calibration and repair procedures vary by ADAS generation, and some systems require dealer-only software updates. Knowing which trucks carry which-rated hardware helps a shop decide whether to invest in the tooling and training to service a particular OEM's collision-avoidance suite in-house or send it to the dealer.

Insurance carriers already offer premium discounts for ADAS-equipped trucks, but the discounts are binary — you have it or you don't. IIHS ratings could introduce tiered discounts, with Superior-rated systems earning larger reductions than Basic-rated ones. That would make the cost delta between ADAS packages more transparent at the point of spec.

When IIHS ratings might arrive

No formal IIHS announcement has been made, and the organization has not published a timeline for heavy-duty testing protocols. Developing a Class 8 test program requires crash-test facilities capable of handling 80,000-pound vehicles, instrumentation to measure air-brake response, and a stationary-target array that simulates highway and urban scenarios.

The IIHS launched passenger-vehicle ADAS ratings in 2013 and has updated the protocol three times since, most recently in 2022 to add pedestrian detection at night. A heavy-duty equivalent would likely start with forward-collision scenarios — the highest-frequency crash type in commercial trucking — before expanding to lane-departure, blind-spot, and intersection events.

OEM support at ACT Expo suggests manufacturers see value in standardized testing, but the timeline depends on IIHS funding, regulatory interest from NHTSA, and whether insurers push for third-party validation as a condition of coverage. Until then, fleets continue to rely on OEM claims, insurance-company recommendations, and word-of-mouth from other carriers when choosing ADAS hardware.