A major accident has made traffic on an expressway dangerous and congested. Which statement about what a police officer (excluding autonomous municipal police) may do is correct?

1. ①The officer may temporarily prohibit or restrict the movement of vehicles in motion and order drivers to take necessary measures.
2. ②The officer cannot restrict traffic without the consent of the expressway operator.
3. ③The officer may restrict traffic but cannot order drivers to take any measures.
4. ④Drivers must follow the lane-use rules before following the officer's measures.