But backing in is significantly safer then pulling in and the backing out. Many years ago, AT&T did studies on the situation and found out that backing in was safer. This is primarily due to vision, when backing out, you can't see the area that well (backup cameras help). When you back in, you get to see the area around you much better.
If you notice the telephone trucks and cars, they will have 2 cones that they put out, one in front and one behind the car. Aside from making the car more visible, the biggest reason is that it makes the driver explicitly look at the front and rear of the vehicle before moving....