Sure you can. The degree to which you "relocate" a snake doesn't need to even be big, but the further away you move a snake, the less likely you are to encounter that specific snake anytime soon.
I often relocate snakes off a path I'm walking on, if I can't get around the snake. Usually a quick prod with a stick does the trick. I would relocate snakes that got in my pool, especially if I was about to take a swim.
I also relocate(read: rescue) turtles all the time, dumb things just walk right into the middle of the road. When I lived in Louisiana, I had the experience saving a hatchling alligator snapper from an almost certainly squishy death.
I understand that you probably meant that relocating snakes doesn't do too much in the long run for reducing the likelihood of venomous snakes winding up in your yard, but if I saw that I had a big copperhead in my back yard, I wouldn't be out mowing until I moved it somewhere that kept both myself and the snake relatively safe.