Intelligent Transportation System, ITS, service station, comprising: a receiver having an area of radio coverage and being configured to receive a first Collective Perception Message, CPM, from a first ITS station at a first position (P B) within the coverage area, the first CPM including first sensor data (sd i) on an object perceived by the first ITS station; an aggregator connected to the receiver and configured to aggregate said first sensor data (sd i) with at least one second sensor data (sd i) on the same object into a third sensor data (sd Σ), which second sensor data (sd i) is either received via the receiver in a second CPM from a second ITS station at a second position (P C) within the coverage area perceiving the same object or is determined by a sensor of the ITS service station perceiving the same object; wherein the first sensor data (sd i) includes a first data value (d i), the at least one second sensor data (sd k) includes a second data value (d k) and the aggregator is configured to calculate a third data value (d Σ) from said first and at least one second data values (d i, d k) and to include said third data value (d Σ) in the third sensor data (sd Σ), wherein each of the first, second and third data values (d i, d k, d Σ) is a distance of the object with respect to a respective sensor, a speed of the object, an acceleration of the object, a geo-referenced or map-matched position (P D) of the object, a heading, angle or path of travel of the object, one or more dimensions of the object, a shape, color or class of the object, and in that the ITS service station further comprises a transmitter connected to the aggregator and configured to broadcast said third sensor data (sd Σ) in a third CPM. a receiver having an area of radio coverage and being configured to receive a first Collective Perception Message, CPM, from a first ITS station at a first position (P B) within the coverage area, the first CPM including first sensor data (sd i) on an object perceived by the first ITS station; an aggregator connected to the receiver and configured to aggregate said first sensor data (sd i) with at least one second sensor data (sd i) on the same object into a third sensor data (sd Σ), which second sensor data (sd i) is either received via the receiver in a second CPM from a second ITS station at a second position (P C) within the coverage area perceiving the same object or is determined by a sensor of the ITS service station perceiving the same object; wherein the first sensor data (sd i) includes a first data value (d i), the at least one second sensor data (sd k) includes a second data value (d k) and the aggregator is configured to calculate a third data value (d Σ) from said first and at least one second data values (d i, d k) and to include said third data value (d Σ) in the third sensor data (sd Σ), wherein each of the first, second and third data values (d i, d k, d Σ) is a distance of the object with respect to a respective sensor, a speed of the object, an acceleration of the object, a geo-referenced or map-matched position (P D) of the object, a heading, angle or path of travel of the object, one or more dimensions of the object, a shape, color or class of the object, and in that the ITS service station further comprises a transmitter connected to the aggregator and configured to broadcast said third sensor data (sd Σ) in a third CPM.