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A set of traffic lights along a street all turn red and green with the same cycle length T. Associated with each light are the parameters:
GT(i) = fraction of a cycle during which the the light is green.We want to synchronize the lights by determining:
DIST(i) = distance from light i-1 to light i.
deltr(i) = fraction of a cycle after which light first turns green. Negative means the light turned green before time zero but is still green at time zero. We standardize by having deltr(1) = 0.Note: -GT(i) <= deltr(i) < 1 - GT(i)