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Legend (TravelTimeIndex/TravelTimeIndex_Maryland_MDOTSHA)

Travel Time Index (TTI) (0)
Uncongested (TTI < 1.15) Uncongested (TTI < 1.15)
Moderate (TTI 1.15 - 1.3) Moderate (TTI 1.15 - 1.3)
Heavy (TTI 1.3 - 2.0) Heavy (TTI 1.3 - 2.0)
Severe (TTI > 2.0) Severe (TTI > 2.0)