I went to driver's school a few years ago after a fender bender to reduce
the points, and other benefits.

I always had a question about entering an intersection when turning left.
Do you enter, then wait out in the intersection, with your wheels turned
left, until it is clear? Or wheels straight? You're a sitting duck for a
speeding ambulance, police pursuit, rearender who will send you into
oncoming traffic, whatever. If you stop back of the line, every car behind
you honks.

I learned that YOU MUST NOT ENTER THE INTERSECTION UNTIL YOU CAN SAFELY MAKE
YOUR TURN COMPLETELY. That would mean stopping behind the line. I have
done that since, but before that, would sit out there, always having a
feeling that I was doing something wrong, and always waiting and watching
for something bad to happen. Another reason to get behind the line.

PLUS, I just love those people who cut the corner, coming through my left
hand turn lane when they are making their LEFT hand turn. They must start
their turn way before their own white line to get that far into my lane.
Another reason for staying back behind the line.

Steve