According to a first embodiment of inventive concepts, method of operating an intelligent transportation system may include obtaining (931) first traffic information from a first source, with the first traffic information including position information for a first vehicle, and with the first traffic information being generated independently of the first vehicle. Second traffic information may be obtained (933) from a second source, with the second traffic information omitting position information for the first vehicle. Responsive to comparing the first traffic information and the second traffic information, the first vehicle may be identified (935) as being non-collaborative with respect to the intelligent transportation system. Traffic coordination may be provided (937) based on a position of the first vehicle and based on identifying the first vehicle as being non-collaborative with respect to the intelligent transportation system. Further embodiments may include methods of operating a first vehicle, transport system controllers, terminal devices, and computer program products.