When you creep your way into an intersection with the intention to turn left, yet there is no end to oncoming traffic in sight.

This way, when the light eventually turns red, you are guaranteed the quick left turn in the short delay between oncoming traffic stopping and the crossing traffic going.
"Traffic was really heavy and the green arrow had already disappeared, so rather than wait through a whole new light cycle, I made the guaranteed left."
by Pilotguy44 October 6, 2009
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