Communicating with self-driving car

[Chris944]

I can flash my lights and sound my horn to attract the attention of another driver in the roads today. Will that work with automated, self-driving cars?

If I'm in lane 2 on a dual carriageway with a self-driving car ahead and want to overtake it, and think there is space in lane 1 for it to move into, will a flash of my lights prompt it to move over? What do I do if it doesn't move over?

Which gets me thinking...

- Will it be safe to undertake a self-driving car?
- How would a self-driving car respond to tail-gating (which is a form of communication)
- Should self-driving cars carry visible "self-driving car" signs to alert other drivers?

I'm interested to understand what other pistonheaded people think.

Chris.