Anyone who has driven on I-5 in central California would know there are long boring streches of straight, flat freeway where speeding way above the limit is the norm. So I was cruising along at 80 mph (about 130 kph) when a series of cars passed me going significantly faster. As I had plenty of charge left to make it to the next supercharger, I figured "what the heck, let's see what this P85D can do". In order to follow the train of cars at a safe distance, I decided to increase my normal following distance of 1 to 4, and tried to set the cruise to a high speed so the TACC would keep up with the fast cars in front. To my great surprise, it unfortunately seems as though 90 mph (about 145 kph) is the maximum speed at which TACC can be set. Even if I set it at a lower speed and increase it manually, it will stop at 90 mph.