The Traffic Service provides real time traffic information related to markets, incidents, and flow.
The Traffic Incidents request returns a structured list of traffic incidents for a specified bounding box in JSON or XML formats, e.g., road construction, traffic collisions.
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The Traffic Markets request returns a structured list of regions, or "markets", for which MapQuest provides traffic data. The list is available in JSON or XML formats.
The Flow Request returns an image of the current traffic for a particular area.