In New Zealand, if you see a police car behind you with red and blue flashing lights, you should immediately and safely pull over to the side of the road. This is because the red and blue flashing lights are signals used by emergency vehicles while performing urgent tasks, indicating that the police car is on official duty and requires you to yield or stop to cooperate. It is crucial to comply with this rule as it pertains to road safety and the ability of emergency services to respond quickly and effectively to emergencies. Non-compliance may lead to traffic congestion, hinder emergency services, increase the risk of accidents, and may result in fines or other legal consequences.