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As part of the Freeway Management System, ADOT has deployed several hundred sensors on freeway corridors that send information back to ADOT’s Traffic Operations Center. This data includes speed, traffic flow and the number of cars in each lane. ADOT uses the actual traffic conditions information to generate a travel time estimate for a specific segment of freeway. This information is then automatically displayed on the overhead message boards for that segment of freeway.
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How does ADOT estimate freeway travel times?