A Tesla owner named Andy Weedman recently found himself confused by a strange glitch in his Model 3’s Autopilot system: The car kept slamming the brakes in the middle of the same stretch of road.
Eventually, he figured it out: His car was registering a giant stop sign printed on a nearby billboard as a real traffic sign, and therefore deciding that the right course of action was the come to a halt in the middle of the road. It’s a comical glitch, to be sure, but the edge case also illustrates the myriad ways that self-driving car software continues to make mistakes — sometimes with deadly results.
Weedman posted a follow-up video in which his Tesla, with Autopilot enabled, spots the sign and drops from 35 miles per hour to a full stop in the middle of the road. Weedman remains optimistic that Tesla will figure it out and says that it will just take more training to figure out edge cases like this before self-driving technology is truly ready.