We can make the transition to AutoSteering safer for the Tesla community if we share information about the current potentially troublesome areas of the autopilot system so that we can learn from others and not have to learn every lesson by trial and error. I also want to post some Driver Beware cautions that may not be related to any weakness in the autopilot but are issues that could potentially affect safety of driving with autopilot engaged. Software update 7.0 gives us great tools to use in our driving. Let's be smart in how we employ them. I'm hoping you and others will contribute to this knowledge base. I hope to consolidate some subsequent contributions in this first post so that the information isn't too spread out. Most important: Tesla says autosteer is only to be used when a center divider is present. Please find language in this post. You cannot expect autosteer to keep you safe without a center divider if Tesla prohibits such an operation. Let me continue with a known rough-spot: off ramps. Off ramps from straight highway segments- On a 3 hour drive on Interstate 80 from Reno to Sacramento and return today I passed many such off ramps while in the right lane. Typically, my Model S veered slightly toward the exit and then corrected back ok. People traveling on other highways with different markings may have had different experiences. If so, speak up. Off ramps at the beginning of a left turn of the highway This type of off ramp was problematic for the autosteering. The car is going straight, the off ramp continues to go straight, but AutoSteer needs to begin a left turn at the proper moment. See photo below. Off ramps at the end of a right turn of the highway Off ramps at the end of a right turn of the highway can be problematic. The car is turning right, the off ramp is positioned well to accept the car on its current trajectory and now the highway veers left of the current path. Lanes that split Lanes that merge Lanes that are marked by a series of white raised circles (botts_dots), rather than lines (reported by a friend in Hawaii and confirmed by mainland users as well) Lines painted on highway that compete with lane marker lines for directing AutoSteering (see this post in this thread) Lack of edge lines on highway (solid yellow on left side of left lane, solid white on right side of right lane) Look for these. Southern California HOV Lane: A thread participant reports here: "... Its a double yellow which changes to dashed white when you are allowed to enter and exit the lane. My car wanted to exit most of the times the white dashes were transitioning back to the double yellow." Wet Pavement at Night with Glare: Sometimes this situation interferes with autopilot according to this post. Driver Beware: Driver Beware: People on the highway I came over a hill today on Interstate 80 to discover a vehicle parked on a narrow shoulder, its door opening into my lane and someone jumped out. Fortunately, the other lane was open and I hand-steered into the other lane. You would waste far too much time asking autopilot to bring you into the other lane. Turn the wheel, the AutoSteering will kick off. Driver Beware: Challenge piled on top of challenge If you pile one challenge on top of another challenge on top of another, you make a more difficult driving solution for man or autopilot. I suggest you getting comfortable with your autopilot performance and learn how responsive it is before really giving it difficult solutions that includes multiple simultaneous challenges such as: * sharp or high-G turns at fast speeds * narrow lanes * lanes where barriers give little room on one side of the lane * lanes where a semi-truck or other vehicle is crowding that lane from the adjacent lane or even crossing over the lane markers or swaying from side to side * poor lane markings * wet surfaces Example of challenges piled atop challenges (submitted by Cyberax): narrow lanes, bus in adjacent lane and crowding the Tesla's lane, lane marked by white dots instead of lines. Need further Input: * Ability of sensors to pick up buses and large trucks reliably when abeam the Tesla. Some drivers believe that shadows created by large trucks might make lane markings between truck and Tesla difficult for Tesla to see. Please look to see if blue lane marker on autopilot dashboard indicator disappears when next to truck. In meantime, please do exercise caution when abeam a big truck.