The Floorit Function
The Floorit Function, or Drivinglike Assymptote, posits that following distance (d) becomes asymptotic to zero as time following a change from green to yellow (t) increases. 
This behavior permits the maximum number of cars to cross an intersection (or make a left turn on a left turn lead signal) without creating a break into which the cross- or oncoming traffic can enter. (This is not unlike the behavior in which drivers can exceed the posted speed limits with impunity when the number of other cars also speeding is greater than three.)
To learn more about this principle and lits application, click here.
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