NHTSA Complaint #11449917 — 2021 TESLA MODEL Y

When using Autopilot, I experience multiple, repeatable phantom braking issues on a regular basis. While it is worse on two lane highways, I've also experienced the issues on separated freeways and interstates. The phantom braking varies from a minor throttle response to decrease speed to full emergency braking that drastically reduces the speed at a rapid pace resulting in unsafe driving conditions for occupants of my vehicle as well as those who might be following behind me. Situations that seem to trigger the phantom braking include cresting a hill with oncoming traffic, navigating a turn with oncoming traffic, a larger than average vehicle (commercial truck/tractor trailer) approaching in the opposite late, shadows cast by large trees or overpasses, and changes in pavement color - for example, transitioning from gray concrete to black asphalt.