The **traffic police** is the body responsible for regulating and controlling traffic on the roads. **Traffic officers** belong to this body and have the authority to give signals and orders that must be obeyed by all drivers. They use arm signals, sound signals with a whistle, and signals from a vehicle to direct traffic and ensure road safety.


In addition, traffic officers are the only ones who can give orders to emergency service vehicles, such as police cars, fire trucks, and ambulances, which have the right of way in emergency situations. These vehicles must obey the signals of the traffic officers to ensure everyone's safety on the road.

Therefore, the correct answer is that traffic officers belong to the **traffic police**, as they are responsible for directing and controlling traffic on roads and streets.