Let me set up the scenario. It was rainy and warm and very humid in NYC last night. This morning, we woke up to clear, crisp, cold, sunny, zero humidity skies. We started our journey at 930 am and about 5 minutes in, we got a message that LANE DEPARTURE AVOIDANCE was limited. AP and Cruise control were disabled. It was telling me to contact Tesla if the problem persisted. It was coming and going. It became quite annoying. We travelled directly South on the NJ turnpike for about 40 minutes. This was happening the entire time south. The Sun was low in the sky and directly to my left. In the East. As soon as we turned WEST onto the Turnpike extension toward PA, the warning went away. And AP and Cruise was back to normal and all was good the rest of the day.
I am attributing the problem to the possibility that between the warm, wet, humid night, and the cool crisp morning, I may have had some dew, fog built up on the cameras. And the direct Sunlight on the left side of my car.