NHTSA Complaint #11633126 — 2024 FREIGHTLINER CASCADIA

The cruise control (level 2 autonomous) will turn itself off without any warning sometimes. This happens any time the truck is set for above the speed limit by more than 2 mph. The truck uses a speed limit map, independent of actual posted speed limits. When the truck detects a speed limit drop to below the cruise setting, either real or imagined, the cruise control disengages without any warning or notification. This is a problem when I expect the truck to continue its autonomous function in traffic situations, but it does not, and without warning. The system will even disengage while it is operating; it will be slowing or maintaining a following distance, then disengage. The driver has no idea if the truck is still auto-driving until he is close to a rear-end accident. Also, bear in mind that speed limit signs are often only posted on the right side of the road; If there is something blocking the sign, like another vehicle, the cruise will still disengage without warning, and the driver does not know it. The only way to tell if cruise is still engaged is by looking for a small green icon in the bottom left of the dash display, which is over 20 degrees down from focal view. Also, there are times when the cruise disengages for no apparent reason. Sometimes there is a barely audible bluetooth-disconnect type sound, but often there is no audible warning. There is also no display warning of any type.