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How does the model distinguish directions of travel?

One of the things that TRAM does when converting a straight roadway centerline file to a TRAM network database is to represent directions of traffic flow explicitly. So a 2-way roadway is represented as two coincident opposing directional features, each with its own speeds (in the peak direction and in the off-peak direction). This means that the travel time contours generated by the model accurately capture travel in the peak and off-peak directions.

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