If you are driving and encounter several instructions at the same time, the following order of priority applies:
Of all the signals you can encounter while driving, a police officer's signal has the highest priority. It applies before traffic signals, road signs and general traffic rules.
If you approach a junction and a police officer signals for you to keep driving, you should keep driving, even if there is a red light or a stop sign posted next to the junction.
It is called "police officer's signal", but the following occupational groups also have the authority to direct traffic: