If you are at the front of the line next to the intersection, you can often see the lights for the cross traffic, so when you see it go to yellow, start your engine. At night, it is very easy to see the color of the cross traffic lights. If you are several cars back in line, it is easy enough to start your car as soon as the light turns green and have it up and running by the time the car ahead of you starts moving. If the opposing traffic and its left turn lane get the green light before you do, you'll need to get familiar the timing of that traffic signal to know how long the left turn lane light remains green once it has cleared of traffic and so when to expect your light to go green.
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