NHTSA Complaint #11452524 — 2019 TESLA MODEL S

Repeated unexpected emergency braking incidents, similar to those described in the recent Washington Post article. The first one happened on the day that I bought the car, and has never improved. One scenario is the same as described in the article - oncoming car/truck on a two-lane road. But it also happens on freeways. If cruise control is on, it's likely that there will be at least one event during a 30 minute or longer session. As others have mentioned, these are often in congested traffic. When a car is following closely, they have to react very quickly. In several cases they have gotten angry because they think I'm slamming on the brakes to discourage them from tailgating. The very first incident, on the day I bought the car, was hair-raising. The car slammed on the brakes in the middle of an interchange where a semi was close behind and there was dense traffic all around both of us. Fortunately the driver was very alert and avoided me without endangering anybody else. But things could have gone the other way. I've mentioned it to local Tesla service people who (at the beginning) said that the car was in the learning period, calibrating the sensors. The user documentation mentions this and suggests that the training interval could be as much as 100 miles. It gets worse and better as Tesla fiddles with the software. It did indeed get quite a bit worse with the release of the Full Self Driving beta -- which I have qualified for but never actually used because... heck, if they can't get cruise control right, I sure don't want them to take on any more responsibilities.