A method for controlling at least one of a traffic infrastructure device and an actuator of a traffic participant based on enhanced traffic data, the method comprising: monitoring, by a trigger processor, an area; generating, by the trigger processor, trigger data in case a trigger event is determined in the monitored area and providing the generated trigger data indicating an area-of-interest corresponding to the trigger event to an image data source, wherein the area-of-interest is a subpart of the monitored area; obtaining, by the image data source, image data captured by a capture device restricted on the area-of-interest based on the transmitted trigger data and transmitting the obtained image data to a traffic evaluation processor; evaluating (S4, S5), by the traffic evaluation processor, the received image data to generate enhanced traffic data on the area-of-interest; and outputting (S6, S7), by the traffic evaluation processor, the generated enhanced traffic data in a control signal, wherein the control signal is configured to control the traffic infrastructure device and/or the actuator of the traffic participant, and characterized in that the method comprises generating the trigger data based on telemetry data acquired by at least one traffic infrastructure device and/or data on mobile wireless devices in the monitored area includes calculating at least one of a mean traffic density value or a mean velocity value, and the trigger event is determined in case a difference of the calculated mean traffic density value from a predetermined traffic density value exceeds a predetermined traffic density threshold, or the trigger event is determined in case a difference of the calculated mean velocity value from a predetermined mean velocity value exceeds a predetermined velocity threshold. monitoring, by a trigger processor, an area; generating, by the trigger processor, trigger data in case a trigger event is determined in the monitored area and providing the generated trigger data indicating an area-of-interest corresponding to the trigger event to an image data source, wherein the area-of-interest is a subpart of the monitored area; obtaining, by the image data source, image data captured by a capture device restricted on the area-of-interest based on the transmitted trigger data and transmitting the obtained image data to a traffic evaluation processor; evaluating (S4, S5), by the traffic evaluation processor, the received image data to generate enhanced traffic data on the area-of-interest; and outputting (S6, S7), by the traffic evaluation processor, the generated enhanced traffic data in a control signal, wherein the control signal is configured to control the traffic infrastructure device and/or the actuator of the traffic participant, and characterized in that the method comprises generating the trigger data based on telemetry data acquired by at least one traffic infrastructure device and/or data on mobile wireless devices in the monitored area includes calculating at least one of a mean traffic density value or a mean velocity value, and the trigger event is determined in case a difference of the calculated mean traffic density value from a predetermined traffic density value exceeds a predetermined traffic density threshold, or the trigger event is determined in case a difference of the calculated mean velocity value from a predetermined mean velocity value exceeds a predetermined velocity threshold.