Recently, one of our clients was involved in an accident while making a left
turn. She put on her left signal and proceeded to turn. The driver behind her
started to pass on her left, which caused an accident. Our client was wrong
because on a two way road with shoulders (there need not be a lateral lane)
the legal procedure is to put on your left signal, then pull over to the right
shoulder and wait for traffic behind you to clear.
Then you may complete your left turn.