Backing up a tractor-trailer into the street from a loading dock, a parking lot, or any location is one of the most difficult tasks any truck driver has to manage. The length of the truck, tractor-trailer, rig, or semi makes it extremely difficult to see all the way behind the truck – especially if the truck has a trailer that moves independently of the truck cab. Many truck companies use special programs and simulations to help the truck driver navigate through backups – before even being allowed to back up into live traffic. Improper techniques and a lack of visibility of objects (or people) behind the truck are major causes of catastrophic and deadly backing-up accidents.