If you want to pass slower traffic, make sure that you check the road situation carefully. Avoid passing other vehicles, including motorcycles and bicycles, on two-lane roads; it is dangerous.
Passing is illegal and unsafe when your line-of-sight is restricted or limited by a curve, hill, or weather conditions, cross-traffic is present, when there is a solid yellow line on your side of the roadway, or a school bus is loading or unloading children.
You must constantly be aware of passing vehicles. Frequently check your mirrors, and if you see that someone behind you is intending to pass, it will be a good idea to move into a far right lane.