What does it mean when a police car turns on its lights but does not sound its siren?

It just means normal driving or normal police dispatch. If the siren is sounded, it means an emergency mission is performed and the vehicle is warned to give way. If the ambulance turns on its lights but does not turn on its siren, it means that there is a patient on board or it is on its way to treat the patient. The patient's life should not be in danger at this time. The ambulance flashed its lights and siren, and the patient in the ambulance was in danger of death.

Other situations of police cars:

There is also another saying that turning on the police lights but not the siren is to avoid disturbing the people. For example, turning on the siren after ten o'clock in the evening in urban areas is enough to cause trouble. Attention is paid to surrounding vehicles. Also during the college entrance examination, ambulances from various places try not to sound their sirens as they pass through the examination room area. Regardless of whether it is appropriate for an ambulance to use police lights or sirens, in order to buy valuable treatment time for patients, it is best to make it as convenient as possible when seeing an ambulance when driving home.

According to the provisions of Article 53 of the "Road Traffic Safety Law": "When police cars, fire trucks, ambulances, and engineering rescue vehicles perform emergency tasks, they may use sirens and sign lights; when ensuring safety Under the premise of not being restricted by driving routes, driving directions, driving speeds and signal lights, other vehicles and pedestrians must give way. Police cars, fire trucks, ambulances, and engineering rescue vehicles are not allowed to use sirens and emergency vehicles when not performing emergency tasks. Sign lamps do not enjoy the right of way as specified in the preceding paragraph.”