The most critical thing to do before you pass another vehicle is

Check your brake lights often to make sure they are clean and working properly.

Know what is going on behind you. Use your rearview mirrors.

Signal well in advance for turns, stops and lane changes.

Slow down gradually. Avoid any sudden actions.

Drive with the flow of traffic (within the speed limit). Driving too slowly can be as dangerous as driving too fast.

To avoid striking the vehicle in front of you, keep at least two seconds following distance.

Look if there is a car coming the other direction

and use ur turn signal