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And not even necessarily that.

Often speeding just gets you to the next intersection, or red lighter, quicker, where you then have to wait longer for traffic, or a green light.

How often? How often you'd manage to go through the intersection before the lights change, and gain even more?

(edit: just to be clear, I'm not in support of speeding, however I do value good logic.)

I can't find it, but I remember reading that an aggressive driver saves on average 20 seconds on what is on average a 10 minute trip.