A method to determine a traffic flow at a point-of-interest (POI). The method comprises determining route segments contained within a predefined POI geometry, creating a POI object that comprises the identities of the route segments contained within the POI geometry, whereby a geolocation of the POI is defined, for each of a plurality of mobile communication devices, determining route segments traversed by the mobile communication device based on geolocations of the device, and determining a number of different mobile communication devices that intersect with the POI based on comparing the route segments traversed by the mobile communication devices to the route segments associated to the POI object, whereby a traffic flow at the geolocation of the POI is determined.