have a "first move forward" parking policy. I think it has been shown to decrease accidents.
Watertown Daily TimesDid you know that the average driver operates a vehicle in reverse for only about one mile annually, yet statistics show that 25 percent to 30 percent of all crashes occur while vehicles are backing up? This information comes from S&ME Engineering of Raleigh, North Carolina. When you consider that the average driver puts on 10-15,000 miles per year, backing amounts to only about 0.00008 percent of the total mileage, yet accounts for over 25 percent of crashes.
http://www.watertowndailytimes.com/article/20150316/MTG01/150318839[http://www.watertowndailytimes.com/mtg01/did-you-knowfirst-move-forward-reduces-backing-crashes-20150316]