An infrastructure device includes a transceiver, programmed to communicate with a plurality of vehicles, wherein at least one of the vehicles is located within a distance defined from a location of the infrastructure device, and at least one of the vehicles is located outside the distance from the location of the infrastructure device; and a controller, programmed to measure a channel busy ratio (CBR) for communication with the plurality of vehicles, measure a package error rate (PER) for communication with one or more of the vehicles located within the distance, and responsive to the CBR being greater than a CBR threshold, or the PER being greater than a PER threshold, record an interference event into a log.