How do you define Congestion? What is the difference between Congestion and Free Flow Factor?

Free Flow Factor is calculated as the "Average Trip Speed" divided by the "Free Flow Trip Speed". The Free Flow Trip Speed is equal to the Maximum Average Trip Speed that is observed in any one of the 24 hours of the day, averaged over all the days.

Congestion is calculated as 1 minus the Free Flow Factor. If the Free Flow Factor is big, the congestion factor (1 - Free Flow Factor) will be low, indicated more congestion. If the Free Flow Factor is small, the congestion factor (1 - Free Flow Factor) will be high, indicating more congestion.

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