A software company took out the ad, which cost around $150,000, to warn the public of its findings - Tesla s Full Self-Driving system does not register or stop for small mannequins in the road.
The video, shared to TikTok, suggests Tesla s self-driving technology was not trained to detect a horse-drawn carriage, as it went haywire when the vehicle drove up behind on on a highway.
Safety campaign group The Dawn Project said the vehicle hit the stationary dummy over and over again at an average speed of 25mph during an experiment carried out on a test track in California.