Australia (driving on the left)
1) I can barely explain this, but it is true - in Melbourne when driving on a road with a trolley track in the middle, to make a right turn, pull to the far left lane of traffic, stop in the intersection, wait until light turns red then make the right turn across all the lanes of traffic before the opposing traffic gets their green.
2) How to signal entering a Round-A-Bout. Left Signal = Plan to exit at first exit at 9 o'clock position. No Signal = Plan to exit at 12'o'clock position. Right Signal = plan to exit at 3 o'clock position