Ключевые слова: accident, ambulance, arrest, authority, black, blue, car, city, cop, crime, danger, dark, department, emergency, enforcement, equipment, flasher, force, help, horizontal, illuminated, law, light, lighting, lights, night, occupation, officer, order, patrol, police, protection, red, rescue, road, safety, scene, security, service, services, siren, surveillance, technology, terrorism, traffic, transportation, urban, urgency, vehicle, warning,