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Question on FSD (Navigation on Autopilot) when at Freeway interchanges.

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The situation is when coming to an exit interchange from one Freeway to another. There are two exit lanes, the left one is a shared lane Y to the exit interchange.

Questions:
1) If on the left lane approach. Do I have to signal Right to take the exit? and when to signal if Yes? Will it stay on the left exit lane and not try to move to the right exit lane?
2) If on the right lane approach, Can I assume it will stay on and take the exit on the right?
3) After the exit the left and right exit lanes merge into one entry lane to the other Freeway. How to signal from left to right and right to left?
4) After the exit left lane, the lane further split to two. Will FSD take the correct lane on Destination setting?

Thank you.