NHTSA Complaint #11449967 — 2021 TESLA MODEL Y

A well known phenomenon of "phantom breaking" occurs frequently and without warning with the Traffic aware cruise control engaged. This occurs not only on 2 lane highways, but even on undivided and divided highways. On the 17 mile commute to work everyday, this will occur 5-10 times, which results in rapid, unanticipated deceleration. At the time of these deceleration events, there is no visual cause to the driver that would have resulted. Often it appears to be activated by oncoming traffic lights, lights on the side of the road at businesses, when cresting the road, and when the road naturally has a bend or swerve in the traffic pattern. These rapid deceleration events place the occupants at risk of rear end collisions and also are uncomfortable as you must immediately place your foot on the acceleration pedal, which results in a jerking movement to the occupants. Telsa needs to either employ a "dumb" cruise control or greatly improved their TACC system before continued use of their system.