An experiment saw a small piece of tape trick a Tesla car into believing a 35 mile-an-hour speed limit sign actually read 85. Cybersecurity firm McAfee conducted the demonstration, revealing an error in the systems that will have to be adjusted before the technology can be commercialized. A two-inch piece of black tape was placed on the left side of the “3,” causing it to look similar to an “8.” This caused the Tesla to view the speed limit as 85 and speed up accordingly. Steve Povolny and Shivangee Trivedi from McAfee’s Advanced Threat Research team have been working to find flaws in automated driving systems for the past 18 months. They have also commented on how even a person would see the altered speed limit sign and believe it read 85.