GPS satellite signals are the new future of air traffic controlling.  Automatic Dependent Surveillance Broadcast (ADS-B) will be used to help provide air traffic controllers and pilots with more accurate positioning information to insure that airplanes stay within safe distance of one another in the air and on the runway.  GPS signals are sent to the aircraft transponders, and then pilots can use the signals to determine the aircraft?s exact position.  This, along with other data, will be broadcast out to other aircrafts and air traffic control facilities. By equipping pilots and controllers with this new system, they will for the first time be able to see the same real-time displays of air traffic, increasing air safety and decreasing fuel costs.  The current system in use is from the World War II era, and often forces pilots to take longer, less direct routes, costing billions of dollars in wasted fuel.