I had to drive down to Barnstable last Saturday. First time I had driven on Rte 3 past Duxbury in quite a while. It was a bit surprising to see what poor condition the road is in. Rough surface, well worn lane markings. I guess I am spoiled because I mostly drive on the I-95 corridor, which is mostly in good shape (except for where it is being widened in Needham-Wellesley). The Model S rides a bit hard so I noticed the pavement condition. The autopilot seemed to handle the lane markings pretty well most of the way. I hope there are plans to repave this road soon! On a more positive note it was my first visit to the Sagamore bridge supercharger. Very convenient, close to the highway and adjacent to McD's and a Dunkin' Donuts. There was another car (an X) at the S/C when I arrived, but otherwise it was unoccupied. It was my first chance to speak with a Model X owner -- he had had it 2 weeks and was loving it. I made it down and back fairly easily, and used autopilot for a good portion of the trip. On the way back I realized I was still on autopilot as I crossed the bridge, in the left lane. Lanes on the bridge are narrow, which gave me some anxiety. But markings were clear and car seemed to be doing as good a job of positioning itself as I probably would have. I approached the bridge with the speed set higher than the bridge's speed limit (45, I think) because the approach road has a higher limit, so for part of the crossing I was traveling faster than I might have intended. I was starting to reduce speed about when the system registered a speed limit sign and signaled that it was limiting speed to 5 mph over the limit (presumably because the road has no central barrier). Don't think I had seen that before.