Benjamin Maldonado and his teenage son were driving back from a soccer tournament on a California freeway in August 2019 when a truck in front of them slowed. Mr. Maldonado flicked his turn signal and moved right. Within seconds, his Ford Explorer pickup was hit by a Tesla Model 3 that was traveling about 60 miles per hour on Autopilot.A six-second video captured by the Tesla and data it recorded show that neither Autopilot — Tesla’s much-vaunted system that can steer, brake and accelerate a car on its own — nor the driver slowed the vehicle until a fraction of a second before …
