Hackers stuck a 2-inch strip of tape on a 35mph speed sign and successfully tricked 2 Teslas into accelerating to 85mph. (no link, AD blocking-blocking site)
Most roads that are posted for slower speeds are quite obviously (to the human driver) not “ready for highway speeds”. If I were on the local state road, straight enough but with frequent side streets and store parking lots, and I saw a speed limit sign that ‘seemed’ to indicate it was a 85mph stretch of road; my first impulse would not be to ‘floor it’.
I guess the software designers haven’t figured out how to code for ‘common sense’ yet.
I’m not holding my breath.