Noob questions, thanks in advance for humoring: Do self-driving cars model, learn from, or both, from other cars? Say there's a new obstruction (traffic cones

Noob questions, thanks in advance for humoring: Do self-driving cars model, learn from, or both, from other cars? Say there's a new obstruction (traffic cones around maintenance crew). When deciding what to do, eg left or right, does the self-driver observe what the proceeding cars did? Do self-drivers remember prior decisions? On the daily commute, there's a speed bump, pot hole, or whatever. Does the car anticipate the remembered road feature? Like maybe "Oh, last time I saw this pot hole, I had to swerve right. So this time I'm going tack right a little earlier." Sorry for noob questions. Imagining a ubiquitous self-driving future, I keep thinking of boids and uncoordinated collective action, like flocking and murmurings. Wouldn't it be cool if cars did similar stuff?