The first thing you should do when passing another vehicle is

The first thing to do is looking around seeing if there's no oncoming traffic, then afterwards while driving in the street and having encountered passing another vehicle, the driver should not return to the right lane until he can see the passing vehicle in his rearview mirror and check the blind spot because there’s a tendency that there is another driver may move towards his lane suddenly without seeing the vehicle. 

It is state and federali really hope this