Complaint 2051802

Complaint Summary

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

Owner Narrative

When approaching stopped traffic, sometimes the truck will respond and begin to slow down. At other times, the truck will continue at set speed toward a detected stopped vehicle, and in situations where the time and distance are way too short to justify no reaction by the system. The truck at sometimes acts like it is auto-driving; at others it acts as if it is only in crash-mitigation mode, and will wait for the driver until the last possible second and then slam on brakes. There have been some times where the truck actually gave a collision warning (alarm and display turns red), but in no way attempted to slow itself. This happens with vehicles detected in the truck's headway for multiple seconds beforehand. In short, the truck will sometimes apparently allow itself to rear-end a vehicle in front of itself, even though the sensors detected it and it had plenty of time to react. When there has been a collision warning with no action by the autonomous system, it has often been when there is less than 1/2 second for the driver to intervene.

Owner-submitted narrative on file with NHTSA. Complaint narratives are self-reported and have not been verified.