Except I feel like they've had years to implement speed sign recognition and I bet they have it already working so it would be more a matter of enabling it. Seems like they are confident they can implement this without interfering with the BS MobileEye/Intel patent that should never have been awarded.
Most patents fall into that category these days .. used to be that it was hard to get a patent as you had to show genuine originality and a workable invention (I know, I went through the process a dozen times). These days you can patent anything ...the USPTO just rubber-stamps it and lets other sue of they think the patent is BS (there are now several patents for perpetual motion machines!). They do the cause Congress told them to b self-funding to they are motived to grant as many patents as possible for the income. The result? We get totally absurd patents that would never ever have passed the "obvious to those skilled in the art" barrier, and lawyers have a field day making money suing each other.