Is there anyone else who wonders why speed assist (adjusting cruise control to posted limit) is only available on newer models with all the new sensors and camera? My 2013 Ford Fusion displayed the speed limit on all highways based on gps data and was quite accurate. The moment I passed a sign with a change in the limit, it changed on my dash display. We've all got GPS data on our Model S'. Depending on a camera to find speed limit signs doesn't seem terribly reliable, anyway. What if you have a truck in the lane next to you blocking your view of the sign? I'm hopeful that those of us with cars produced before September will see this feature in an upcoming software update.
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