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Message: <blockquote data-quote="RAW84" data-source="post: 1162719" data-attributes="member: 28994">So in the video, TACC is working fine. It's locked into the prius, but the prius turns right and the model a driver wants to go straight, so by the time the TACC accepts that the driver is going straight and locks onto the white car, it's too late to fully stop. I see no problem with this, but this just illustrates one of the many instances which causes Tesla to say TACC is not designed for surface roads. I do think TACC works fine on surface roads as long as you have a basic understanding of how TACC operates use common sense as you use it, tho....I use it everyday on surface roads.In my experience, TACC doesn't do a good job stopping behind a car that's already at full stop because of stopping distance. If I'm cruising along at 45 mph, the car doesn't recognize and accept the fact that the car in front of me is stopped until it's too late, but at lower speeds it can work. I don't know what that cut off point is, though</blockquote>