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European Transport Research Review

An Open Access Journal

Fig. 1 | European Transport Research Review

Fig. 1

From: Integrating mobility data sources to define and quantify a vehicle-level congestion indicator: an application for the city of Turin

Fig. 1

Visualisation of the different steps of the methodology: (a) scatterplot of flow (number of vehicles/hour) versus travel time for a selected arc, (b) selection of experimental points within the time range 8:00–8:59 am, (c) the search for GPS travel time values, with focus on the same time range, (d) the search for free flow travel time value T_0. The legend is available on the top left part of the figure

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